i always wondered that too. i never did. felt awkward, so i just ignored them if they didn't have a board too haha. Psychological surveys? sounds fun, woot.
yeah, i'm not one to send a lot of friend requests myself, unless i have a good solid conversation, or a couple of them.
i get friend requests sometimes from people i've never even seen before. or people in the forums who i've never really talked to, but they see me yapping so much they just friend me i guess haha.
if you were in chat right now i could be bugging you there instead of filling your wall with pointless nonsense. =P