But Eric's comments make him sound like kind of a moron. Maybe he should stick to computers.
Hint: "Uhh, durr, how would you like it if your neighbor just built a tall treehouse in his yard and stared at your house all day! These treehouses have to be regulated! Oh, and duhh, what if someone uses an RC controlled car and they just drive it around menacingly on your sidewalk in front of your house!".
And now, back to things that are likely to happen in any meaningful number and which can't be easily handled with existing statutes...