>Even though there's no HOA he is probably running afoul of city or county zoning rules...

Many days I can't find a good reason to appreciate living in the US. I'm glad that there are places to live where a guy can buy an old fire truck if it tickles his fancy. I'm also glad that there are ticky-tacky neighborhoods with HOA's in towns with strict zoning, so you and I won't have to be neighbors.

I also can't think of a reason why I should fear for my children's safety if my neighbor had one of these in his driveway.