As we all get into the scene, our intuition can guide us quite well. We all should learn to listen to it, as it can be quite helpful within all negotiations. Newbies may not have developed that sense of "Danger, Danger Will Robinson, Danger!!" that experienced players get when encountering someone who may not be that healthy to play with.
There may be some known, or unconscious manipulation of the facts that lend someone to believe the purports of skill or experience of someone who is not what they portray. Don't ever let people manipulate or guilt you into playing with them.
One thing that I would strongly recommend to newbies and newer players; whether you are a Top or bottom, check out the reputation of the person you are playing with. This is a smaller community and most people will know of, or have heard of the players. Unlike general society, the BDSM world thrives because people observe, and are honest about what they see the other players doing.
Also, if this is not possible, watch that person play with someone else. See how you feel about their style of play. Is it the way you desire your play? Is it too much, not enough, too hard, or too fast? Not enough warm up? Not enough aftercare? Whether they believe the other to be following the precepts of safe, sane and consentual or risk-aware consensual kinky play. etc..
I can assure you, that as a Top/Dom I am flattered that you would asking people about me. I also will think higher of you, because you are thinking ahead, and care about who you are playing with. Don't worry about it getting back to us, because if our reputation is good, then we will be honored by your inquiries.