I don't find very much that can be discussed to be offensive if anything at all. The only thing that bothers me is people sticking with some notion of what is acceptable to discuss.
I'm sure you've heard, "There's certain things you don't talk about" or "We don't air our dirty laundry..." and all of that jazz. It kind of bugs me that people will avoid an issue for no real reason other than they were told at one point that it was "Taboo". It's those people that get upset about a simple discussion that offend my sensibilities in general.
Personally I can deal with someone who thinks I'm an idiot or just dead wrong but not the person who says, "I just don't want to talk about that". As if they were so afraid that their ears or eyes would burn up should they partake in the subject matter.
