You guys have given me more than enough material that if my players get sloppy I can (and will) call them on it. Our campaigns tend to be R-rated most of the time, a light X-rating for gore and violence detail sometimes, but I want Star Wars to be PG or PG-13 to maintain the feel.
I already have one player practicing his wookiee speak (far too good for anyone's sanity) so insisting on Star Wars appropriate cursing should be ok. Especially as I can point here if they complain it's too hard.
Cursing in Star Wars
I prefer not to curse in general, this is also equally acceptable.