I go AFK in Haven quite often, and when I come back I usually have a mix of two or three guild or friend invites waiting from me. Invites to guilds I've never heard of from people I've never talked to, and friend invites from complete strangers that I've never talked to before.
Maybe it's just me, but I think this is bad etiquette. If you want to be friends with someone, if you want someone to join your guild, you should get to know them, talk to them, do stuff with them, etc. It just seems all the random invites and friend requests I get from people I've never seen before is a bit shallow, and doesn't reflect well on the community.
I get about 3-4 guild recruits a day, even while recruiting for my own guild :/. Plus, lower rank knights send friend requests, with comments such as "vana plz", "give me money". I try just to hide sometimes :P