I thought about posting an analogy involving showering in a (co-ed, for Aj_'s benefit) gym facility, but it was in too poor taste for even me. Basically, just because you know your neighbor has something doesn't mean you're welcome to use it without asking.
Perhaps a stylish tinfoil hat could provide protection from possibly dangerous and unwanted wi-fi signals invading one's personal space?
*snickers*
ScottMate