I've done exactly this. Read Roissy, read far-right sites (though not Coulter specifically.) Basically sought out the experience of having my feelings hurt, in the interest of curiosity.

I learned a few things from the experience. First, they have a few good points (my politics have changed over time). Second, they are not right about everything just because they are mean and nasty and make me feel bad, and in fact sometimes right-wingers and anti-feminists display flaws in reasoning. And, third, I learned how to deal better with emotional antagonism itself: I don't bother seeking out excuses to be offended any more, but I do protect myself by avoiding people who directly insult me.