There is a difference between practical jokes and vandalism. My general guidelines for practical jokes are that no one gets hurt (physically) and nothing gets permanently damaged.

I'm glad it got resolved. Had it not, I'd have resorted to something other than the vandalism proposed in so many responses -- something like, get a friend with an incredible eyesore of a junkheap to park in front of your neighbor's house until someone complains to the HOA (assuming the junkheap is his because it's in front of his house).