Custy, i'm not actually arguing with you either...honest missus! But I get a bit ooooh, defensive, probably, when the responsibility for language use comes back on the people who are potential 'victims' are the ones expected to make al the allowances in the 'chillin' department. As Clarinsgirl says "My message simply meant that I think tolerance and understanding are good rules of thumb when it comes to matters which are not cuturally universal. " but that works both ways, and once the reason a word is explained as offensive is explained, a little consideration might be given.
Actually, Clarinsgirl, 2Shoes does happen to have a mentally disabled dd who has been bullied, and she is reacting to a couple of instances where the word is being used casually on MN to describe people who should no better....which i do think is as Fio says, akin to using 'spaz' as an insult to footballers who eff-up. (since 'retard' is a slang word for someone with learning disability...it is the same in America, actually, but the etymology seems buried further back since they have been using it in common parlance longer than us)