I wrote this years ago on Red Flags as part of a larger article - here
https://thecage.co/blog/userblog.php?blog_id=12755&postid=1587 Some comments below relate closely to that article context, but for here I have tweaked them to be broader in scope.
Redflags
There is a commonly used term in the lifestyle, ‘Red Flag’ to indicate or warn of an individual's specific current dangerous behaviour, dodgy past history or perhaps refer to an attitude about being checked out or vetted. Usually (though not always) those who seek to evade have something to hide at worst or have an ego so big nothing or no one is suited to check them out and how dare anyone think they need it. These types often believe they have a God given right to just be accepted and don’t recognise that other peoples comfort and security must be a priority that overrides any individuals entitlement issues to just be accepted. Frankly if they can’t see or accept the need for them to be vetted then, they are not – in my view – fit to be included/allowed to take part in any real life community where the well being of the members is foremost in importance.
Real life community leaders will also have a pretty good idea who is to be treated with a degree of caution or extreme caution, or has one or more permanent Red Flag status marks against them and as such, and while it’s not an easy position to be in, knowing such, they will and in my view have a community responsibility to be able to offer advice re whether you should get involved with someone or not. It should though be kept in mind that some community leaders also have red flags against their behaviours. Unfortunately in the lifestyle not everything is as straight forward as one would hope, like to think.
Reputation is everything in the lifestyle, hard won and easily lost, but before getting involved seriously with anyone whether part of a real life group/clearly defined community or outside off it (and I caution against this – it is potentially more dangerous) ask for references. If a sub, ask the dominant for contacts from previous subs if he won’t do it then walk on by and the same goes for dominants re subs, talk to previous dominants and masters. As I have said earlier on in this writing not everyone is who they claim to be and being/keeping safe is better than ending up seriously marked/hurt, raped, emotionally screwed up or lying on a morgue table and if you’re a dominant you may find yourself in a police station accused of all kinds of things because a newbie, ignorant or unstable sub, unsure/dishonest of her limits etc withdraws consent afterwards - because it was more than she thought it would be. Those who think that stories of murders within BDSM activity are myths should do a net search to see just how many folks over the years have fallen victim to those using the lifestyle to feed their non consensual violence.
Also keep in mind that just because you have sat beside someone at a munch (not all munches vet attendees) or at a training event does not necessarily mean that person is safe, sane or respects consent and the fact it can be withdrawn at anytime. Trust must be earned and taking your time to scope people out before getting involved is the common sense thing to do. Sadly many leap into things way too soon, and don’t take the time to research the person they have met and on the face of it see a compatibility re interests first before the person being safe, sound and ethical. Ask around, ask the elders of the group, the group owners (if it’s a formal real life group, even if its online) what they think of the person – any honest responsible, with nothing to hide dominant or submissive will not mind questions being asked, in fact they should not only expect you to do this but they should positively encourage it – if they don’t be worried and run.
If the community respect them, it will become clear pretty soon, but even the odd bad word should be examined and researched. I would strongly encourage looking into anyone’s history as much and as far as you can. Go talk to ex's and in doing so be prepared to separate emotional baggage from actual examples of dangerous activity. Check out their online activity fully, what they write etc and if any friendships end suddenly, especially if they come after a longish period of mutual status and wall activity (this applies to Fetlife), contact the person/persons involved and ask why things ended. People fall out all the time for fairly reasonable reasons but it’s worth finding out why just in case there was a case of stalking, obsession, unreasonable behaviour – if there is this in their past I personally feel it would be cause enough to be concerned, especially if there are a lot of examples of this.
In saying all the above the vetting system if done fully and well is better than nothing, but it must be born in mind that someone being a member of a group does not represent a golden stamp of permanent approval. Sadly re safety within the lifestyle often things are not as cut and dried as it would be the ideal so be aware constantly and question everything and don't be afraid to speak up if anyone leader, group owner or regular member acts in an inappropriate, pushy or dangerous way.
I have spoken above mostly about real world activity but harm can be fall those engaging in online activity as well, so it is very much worth while to treat the virtual world in the same way you would the real world. It's a sad reality that not everyone in a chat room, or at the end of a pm is who they claim to be, nor are the exploits they might claim/boast about either. In my opinion if considering getting involved with anyone in an online relationship I would perform exactly the same kind of checks as I suggest for real world activity. Keep in mind that just because you are not in the same room as someone that the activity you engage in might lead to mental damage or even physical if a dangerous/ignorant unethical individual requests you do certain things to your body, or requests certain mental disciplines.
Specific Red Flags.
...... see Kieva's post above.