The thread about political views and drinking got me to thinking...
In your opinion, during what begins as a non-confrontational discussion, what topics are met by the most open hostility? Is it race, abortion, religion, what? And, what type of person is typically the most hostile?
For example, are liberals or are conservatives (or women) most hostile about abortion (or whatever)? Who is most likely to make it impossible to have a somewhat reasonable discussion?
I just listed some random ideas for the poll, but I thought it might make an interesting discussion thread.