I never know what to do when I feel offended (there are things that set me off) - unless somebody's deliberately trolling me they're exercising their free speech right (except in Canada where you don't have free speech), and if they are trolling me they are deliberate in their intentions so I could feel offended if I wanted bc that's the point.
For example, I figure Yarbles is tired of my categorization of 'his' sexuality, even if I am jesting. Would I expect the same from people who offende me, even by mistake?