Christ.
That could be a numerous things, but i suspect child molesters, terroist, serial killers would be at the top of most peoples list.
I think the term ''evil'' is used to often these days, as you pointed out, would someone stealing be classed as ''evil''?
Low life {yes} but stealing a mars bar from the corner shop and a terroist blowing innocent people up surely cannot be classed as both ''evil''.
In regards to being born with it or learned behaviour, i would side with learned behaviour as don't believe you can be ''born with it'' tho the phrase ''born evil'' does spring to mind.
Interesting question mind you