Vandalism Specific {{subst:uw-vand1|PageName}}~~~~
(start with test1, then test2...test4 as the users vandalism gets more and more persistant.
See WP:TT for a list of other tags you could leave for more subtle descriptions of whatever offended you.
If you are really enthusiastic - look at the vandals "User contributions" and see what other pages they edited recently - the odds are good that those are vandalised also, so you could go there and clean those up also.