It seems to me that as the functions recruits and students use facebook for expand, it becomes really problematic to try to regulate "friending". I am friends with a few of the current players (who I met on a tour after a game), and they post comments about practice performance, links to highlight footage, etc. all the time. I can only assume this is true across the board. I don't message these guys, don't try to have a creepy relationship with them or anything, and they clearly are using the site to disseminate information in an impersonal way. Personally, I love getting those updates. With that function in mind, I think "friending" is totally reasonable, and in some ways less stalker-ish than a rivals (or any recruiting service) subscription.
Kris