Honestly, I don't give much of a shit. I usually curse with my friends, who also don't really care. I do censor my language when it's not acceptable, like in a classroom, or an interview, etc.
Honestly, they're just words. They're only as hurtful or offensive as one makes them (because the last time I checked, sounds tend not to hurt a person).
Just don't use them to hurt people, because some people DO care and can be very offended.