I'm not easily offended, instead of starting an argument I just ignore the person and walk off. Even if they continuously bother me, hopefully they'll eventually realise it's only making them look foolish. Although I feel anger boiling up inside of me when people use racist terms or discriminate other races, call others "retarded" and other terms.
It's not like they wanted to be disabled. I'm just frustrated and want people to treat the disabled like normal people not 'retarded freaks', as some people say. But yeah I hate racist comments and words used to attack the disabled. :(