When you are befriended here at Rollitup the tradition is to send the other person a big bag of weed. And as far as I know everyone has always done that. So - to answer your question - you missed out on a couple bags of pot because you wouldn't click yes and friend someone. Hope that helps.
It was either a "friends" list or "assholes" list. The admin thought there would be too many assholes for everyone to have a list so he went with "friends".
if it dont matter hell I ll simply accept them I was just being careful... for instance I dont want everybody to have my email address... would a friend see you personal infos?
They can't see anything that anybody else can't see on your profile. There are no "privileges" given to a friend. ...or maybe I should say benefits for friends.
Don't feel bad, I knew of no advantage or disadvantage to it, so I usually click 'ok' when I get one, and just imagine somebody sitting at their keyboard getting all happy.