Belmont, have you ever considered that the asshole in your situation could be connected. For example, what if the neighbor in the pool situation was a mobster. It is feasible that he could tell the guy putting the pool in that he would have to pay him extortion money or he would have the pool ripped up.

Also, what if the pool guy put the pool on knowingly and without asking permisission hoping that he could push his neighbor around? I don't think the mobster would mind helping the asshole as long as the price was right.