There is no reason they couldn't, as long as they don't trespass or do anything else illegal. But who would want to do that? It would take a heck of a committment in time and money. If they did find something fishy, what good would it do? Most JWs are not going to believe anything from so called apostate sources, so they would just think it's made up or that Satan attacking them.
Maybe if you could get a picture of tight pants Tony in drag and it got media attention, but other than that I don't see it being worth the effort.