You know what's great about living all crammed together in a big (but very little) city like San Francisco? Neighbors. (And craigslist.)
UPDATE: OK, the scary/annoying saw-totin' neighbor is in Boston, not Frisco. (That's the last early morning post from me.) And, of course, I realize this whole "ain't neighbors a drag?" concept falls squarely in the "stone-throwing glass-house dweller" realm, what with the sounds of squeezeboxes emanating from our home on a regular basis.