NO. Don't do it. I saw a presentation the other say where this guy was looking on facebook and he found some girl's username, and when he put it into Google he found so much about her he was able to go to her house the next day. He was looking on public sites only, too.
It depends on if you trust your friend. Did they ever breech anything of yours? You can do what ever you like, but if you do have doubts about your friend, then i would advise you to be cautious, because they may be loyal and trustworthy around you, but are they when your not around? Hope this helps!
No. I gave it to my best friend not knowing what she was gonna do with it and bought an app on my ipod and didnt even ask me, then a few days later, she changed all of the itunes info to her moms. And we werent even enemies. Dont dont do it.