A red flag that I usually see is when potential sub touts themselves as having "no limits." I just find that hard to believe. I also tend to notice when a sub jumps in and addresses everyone as Master (whether they know the person or not). Just kind of raises my eyebrows. If a sub is more interested in an immediate sex/control situation than even knowing your name, it just screams wannbe to me.

But yeah, TW, I think you have a point. I think that a wannbe dom may have to potential to be more concerning or dangerous, but there are definitely wannbe subs, as well.
-Phan