Hunh? Wha's wrong with the intarweb?

This past week, on and off, I've noticed somebody hammering at my wi-fi trying to get acess. And it's not like they are trying anything overly intelligent to get in, just request after request after request for a DHCP address. Now I have things limited to a handful of specific MAC addresses so they aren't getting in, so I'm not terribly worried about them stealing my bandwidth. But then I remembered this website: Upside-Down-Ternet

So, I thought, why don't I try to do that to them, too? Then all I have to do is figure out who in my apartment building is trying to get free high-speed intenet access. :-)