My bad. I take the "bad person" back:)

But still, I don't think bad habits can be hidden for long if we pay attention.
In all the cases that I have seen (O.K. I know this is statistically incorrect:)), women knew that their guys had bad habits or were bad persons. But they still went ahead and married them. The women thought that their guys could be changed later. Or they thought that the bad parts were unimportant comparing to the guys' degrees, $$, green cards... Also, some women are just naive and some don't have their thinking hats on (sorry to say this but it is true).