Sending mass friend requests would put your account in danger. Why would you want to do something like that anyway? If this has something to do with adult / dating traffic, then posting on groups would be a better choice. You'd see floods of friend requests to you and FB don't see any problem with that.
Also, there's an exploit going on FB that would let you bypass some stuff. So..I really wouldn't bother sending mass friend requests in the first place. How did I know all of these stuff? I've been going on FB in the past few months already, and coded numerous bots for it. It's fairly easy to hide yourself from them, IF and only IF... you won't be greedy as f*ck.
Just my $0.02.
