My compromise, which works for anyone in an apartment building is simple. Name your network like this:
Bring beer to [apt number] for Password
It's a nice way to get to know your neighbors, gets you free beer (pro tip: you can substitute other items for beer), and lets you be generous with your wi-fi while giving you some added level of security from the WPA encryption.
[robg adds: I can think of both upsides and downsides to this idea; it will be interesting to read what others think of it.]

