Punk is as punk does!
Well, that's one opinion! A valid one too.
However, I personally enjoy the punk covers. Even more so then I like original punk songs. Ever since this new invasion of pop-punk bands (Sum 41, New Found Glory, Simple Plan, etc...) has taken over, has anyone noticed the songs all sound the same? The lyrics suck, and every lead singer of any pop-punk band seem to have the same voice. So basically, I don't much care for punk. I used to like it before the invasion, but ever since it's just turned me off it.
Which brings me to why I like covers! I like the rocky, hard feeling of punk, and I like these old songs/themes. So, instead of listening to their craptacular songs, I can listen to songs I already like but with a new edge put on them. And I feel that the Fraggle Rock theme song, covered by Allister, was done pretty well. I didn't think they were defacing it, because I found it really enjoyable. (I also liked the cover of Rainbow Connection. So nyaaaaaaaah! XP)
And then I look at it another way. If I were in a band I'd LOVE to do a cover of theme songs from my youth (Fraggle Rock, Teenage Mutant Ninja Turtles, blah, blah, blah...) So who am I to take that away from them? They might've really loved the Fraggles, and they're showing their appreciation. And it brings more publicity to Fraggle Rock, which *I* appreciate!
But that's just my 2 cents.
^_^ Debo