*cheats, not creeps, who lies to you for his/her personal gain, e.g, a married guy telling you he's single to 'have fun' w/ u is a cheat but a single guy just hitting on you is not necessarily a cheat (unless he's promising things he won't/can't deliver).
I've come across:
F, providing paid webcam services
F, trying to lure guys to specific bars (for commissions I suppose)
F, providing paid sexual services
F, asking guys to buy stuffs for her
and the last one is not someone I've encountered personally but heard from a good friend,
M, being extremely nice to girls, inviting them for dinners, expressing willingness to help with everything - all for the sake of selling what his job offers, and once deal is done... virtually disappears.
It's fun to find such variety of people when you've added 400+ so-called 'friends'! Luckily, i might be too old (or too young) to fall into those traps but it's amusing to browse thru this site and find some cheats.