Never. That's conspiratorially immoral and dishonest to your soul.
Choices, circumstances, people don't realize the dire consequences in the end.
Sometimes, but not always.
I don't think so, reasoning is mainly I could never look at the person the name, and certainly struggle to trust them....<br />
....then again if I was the one who cheated, then it was clearly just a mistake and will never happen again :)
Let's see, how about a no.