I think a big factor is that you don't have an easy choice. Notice it's not "Allow" or "Reject", it's "Allow" or "Ask us not to". The only "Reject" is to flat

I think a big factor is that you don't have an easy choice. Notice it's not "Allow" or "Reject", it's "Allow" or "Ask us not to". The only "Reject" is to flat out not use Facebook, and probably throw a few related domains into a blackholed HOSTS file. That's a steeper price than most are willing to pay.