Get more coverage!
Acts like this show people up for the humourless twats they really are. It's one bloody week and then it's all forgotten. At least he's guaranteed himself months of piss taking now.
I don't think there is really anything Prince could do about it since it would be tried in the US and parody is fair use there. However, setting aside the legality of the DMCA request since it would be very expensive and time consuming to defend, I can't see how a positive spin can be put on stifling free speech like this.
This sort of thing should be reported by more media (no offense intended reg, but your readership is likely to know about this or at least know about the DMCA and B3ta anyway) so that the whole country gets to see what kind of an fsck'er Prince is.
We *NEED* proper free speech laws in the UK, what's next - no private eye, HIGNFY, etc. etc.?
Oh, BTW, there seems to be some speculation regarding if WebSheriff are even legally entitled to send DMCA notices. I haven't got time to dig but some enterprising reporter may wish to look into it...