Here's what I've learned:
* If they've just joined in the past month.
* If they don't have pics in Cincinnati.
* If their English is odd. Things a hot Cincinnati girl wouldn't say.
* Seems too good to be true.
* Has a sob story nearly immediately and asks for money.
* If they favorite you without viewing your profile.
* (more obvious) if they're from cities that are actually states (California, Ohio or Ohio, Indiana).
Just block and move on.