Here is what I tend to use on The Cage. Now, I am not a sub, but I cannot see why some or all of this might not work for you!
1. You get a message
A. Deal killers - these messages should really just cause you to hit the delete / block key imho
1. You will submit to me! I am your master! (go back and watch 50 shades again bub!)
2. Want to meet off site? (why? The cage is a wonderful place to get to know people!)
3. Hey I live close, want to meet up? (Danger Will Robinson!!!)
4. Any type of name calling, be it good, bad, or cutesy! (baby, sweet cheeks, slut, who cares .. add em all!)
If you met somebody say in the park, and they did any of these upon first meeting you- would you smile or call a cop? Beware the insta-dom! There are no "just add water and mix" dynamics. BDSM Dynamics that are going to last IMHO begin like any other relationship - friends getting to know each other.
B. So its a good message! You like what you heard, or are interested in learning / hearing more?
1. Read their profile - step 1 - is it vague and vanilla? is it barely there? Anybody looking for a real dynamic imho will have taken the time to write one.
2. Scroll down their profile, to their forum posts, read what they have written. Are their responses to other members "in tune" with your beliefs / wants? Do they seem to change their opinion constantly, saying what the OP may want to hear?
3. Do they blog? If not, not a deal killer, some just don't. But if they do, take the time to read their blog, entirely. You can learn alot a person from a blog
4. Do they have an ad in the personals? Read it.
5. Have you considered finding an online Dom (a well established one) for protection? Now that doesn't mean they come live with you and watch over you, but you place in your profile that any person wanting to know you for more than friendship must contact your "protector" and be vetted. As to timeline, that varies by person, but most would agree "only fools rush in".
Now I am not saying there are not quality people joining us every day, in fact, I hope there are! But what I am saying is the more established a person is here, the more you can tell and r learn about them. Use that info! Then just start talking to them, like you would any other person you met
This is prolly not the perfect blueprint for success, but it can help you weed out the "playahs"