Stupid parents...
Well, everyone knows kids love these types of humo(u)r... If the kids of these people complaining are having problems with the song, then I guess they have other, more pressing problems to deal with, really...
We were a bit more hardcore back in Brazil though, and used to enjoy a song called "Papai Noel filho da puta", by an old local punk band (Garotos Podres). Look it up, it's even on YouTube. :-)
One of my grandmas laughed hysterically when she first heard the opening line (which is the yelled title) of that one -- we thought she'd be mad but she actually agreed with the song, hehe.