Dp's ex wife added him to facebook last year. All of a sudden he recently got a text kicking off accussing him of saying stuff about her and telling him to die. She then deleted and blocked him off facebook.
So since then he's said "well if she tries to add me again, I'll be ignoring her. No reason for her to be on my facebook anyway " etc etc
So this has been the situation for a few weeks now today she sends him a message saying she deleted him by accident and sent him another friend request. He then said to me "what shall I do? ignore it or will that just cause trouble?" 
ffs so I said "do what you want" so he's added her again!
AIBU to be pissed off at his lack of backbone?