Hmmm I think it would be possible, I remember a link in peoples profiles that would change anyone who clicked it into a black bunny, for any annoying stalkers or profile harassers, it was used in a few sims, I even tried it once, then used it for a bit before I figured it was too mean...
You were required to click the link though, so if its possible for RLV to force someone to click a link, or go to a link in SL, it should be possible to make this script. Just force the link to be clicked once a person collides with an item. Its pretty brutal but I suppose most RLV scripts are.