I've noticed it very much in this town - the poor men cannot be blamed, because the nasty little trollop offered it on a plate/ tempted him away from his blameless wife etc etc etc.
A close friend had a long "affair" with a wank stain of a MM. She was not yet 18 when it started, he was in his 30s and married with children. It was vile, she saw it as a wonderful relationship (she'd had a crush on this guy as a child) and he saw it as a booty call. She was one of many, as well. He gave his wife an STD, didn't get it from my friend.
She is still, 5 years on, vilified in the town. He has moved on, has a fiancée and lovely life. He's a cunt of the highest order.
OTOH, I know MM who desperately want out of marriages but don't want to hurt their wives by just leaving - apparently it is "better" to leave over an affair, because it means you aren't just rejecting your partner.
This is excellent man logic, and of course infallible.
Women who do "go after" married men as a choice are of course doing something wrong. But women who meet someone and get into something wrong through a series of small bad choices - I feel sorry for them, really. It can't be easy, being second fiddle all the time, plus the stress and fear that they'll get caught etc.
It's just not black and white. People that cheat aren't universally evil, the partner left behind is not either perfect or on the other side utterly shit - all relationships have problems.
I remember my mum meeting one of my father's OW (previously her close friend) and warning her. DF left the OW soon after, for one of the others. This OW had come out of an EA relationship, and gone straight into another one with my father. She wasn't a terrible person - I liked her a lot. She made a bad decision. (DF is quite another kettle of fish - as I said, choosing infidelity as a lifestyle is less understandable than one affair.)