My neighbor has lost his mind, LOL!

I have some valid concerns of the intelligence levels of some of my neighbors. Take for instance the guy who moved next door to us...the ground here is rock hard and chuck full of clay not to mention infested with the hardiest weeds we've ever seen. We're having a professional landscaper take care of this for us, he's already gotten the weeds under control and we're soon to get the sprinkler system, fence and well the lawn and the other things that come along with hiring a professional landscaper. So where am I going with this right? So the guy next door to us buys the 2nd most expensive house on the market in our particular neighborhood (it's $250K) and what do we see him doing that has us wondering about him...first off it's when he sends his kids (9 and 14) into the yard with pick axes to get the small average every day looking rocks that are embedded in the rock hard soil so he can use them in the rock garden he has started in the front of his house. These are not nice smooth looking river rocks or even something that anyone else in the entire neighborhood would put in their yards. The other thing we saw this strange man do is to walk around with a bag of grass seed and willy nilly toss them onto the ground. No spraying for weed control or raking of the soil happened before he started his little tra-la-la through his weed infested lawn. So any day now the birds will be swooping down upon his lawn like a scene from Alfred Hitchcock's movie "The Birds" to gobble up all of his grass seed.