Something the media could grasp as well would be desirable. Nor are the intruders likely to call themselves vandals, etc. In other words, while I do maintain that this class of people needs a name, one that they can call themselves and everyone else can call them also, I also maintain that the existing names don't work. Like a spider in your basement. Indeed, spiders are just about everywhere.
Many people are unnecessarily afraid of spiders.
They're annoying, but most spiders don't harm anything. Most people try to squish spiders when they discover them. Anyway, you get the point. The more I think about it, the better it seems to fit. They weave webs.