Well, I just protected my page today, after it had been vandalised for the 10th time in 8 weeks by the same bastard, using a range of IP addresses so individual short-term blocks had no effect.
I strongly support the proposal to restrict the editability of user pages to the user concerned in normal circumstances.
Ten edits in eight weeks by one vandal is nothing. It could be easily rolled back, and you are just redirecting the vandalism to articles. The only time protecting user pages is useful is when there is a vandalbot that attacks a given list of pages.