Is "bastard" really so bad?

A little blog for my musical-loving friends. I saw Starlight Express like four times back in the day, had the soundtrack, the whole nine. In one of the songs, U.N.C.O.U.P.L.E.D., the girl sings about getting revenge on the guy who broke up with her by calling him a B-A-S-T-A-R-D. Cue huge cheers from the audience. Last week I was thinking about that song and found a couple of versions on YouTube. One said "S-C-U-M-B-A-G" and the other said "lousy C-R-E-E-P." Personally neither of these really fits the bill for me - but then again I think she ends up getting back together with him anyway, so it's all a choo point. (Get it? Like a moot point but they're trains?? Ahhhhh)