I remember seeing a video several months back - I couldn't possibly remember whose - that talked about this idea of taking the NAP ultra-literally to the point where you're beating up people for accidentally stepping on the corner of your lawn or something like that. They said that the NAP has a corollary, and it's YAD - You're A Dick. So yes, if a kid climbs your fence to fetch a baseball or something like that, he's violating you and you could beat him up - but you're a dick if you do, and the greater society probably isn't going to want to deal with you very kindly once word gets out.
Also… "EQ?" Yes, you have been in Japan for too long. :P
RE: The Daily Owl, Ep. 26: You Gotta Be Human Before You Can Be A Libertarian