I'm going to go a bit philosophical by saying names have power. I don't believe it is offensive to have a name for something and certainly naming a group, characteristic or object gives it a place in the culture. My names include a personal name, family name, ethnicity, nationality, financial strata, sexual preference, mental state, etc. Each of these words represent a specific thing which helps place me in my culture. The point, though, is none of them mean 'bad or 'good'.