Share ideas in the art of deception.

Let's get a good list going of ways to con people.

Bait and switch.

http://en.wikipedia.org/wiki/Bait-and-switch

Lure them in with a good deal then raise the price. Good way to advertise, not all fall prey to the psychological mind games though.

Impersonation.

It's where you pretend to belong to some group and say things that defame them because you can't find any examples in real life!

Works great on anonymous text boards.