Agreed, Memphis didn't send either Gasol or ZBo to trail Bonner to the perimeter in 2011 either. They already know they can simply close him down by running a smaller perimeter guy towards him, and then he'll hesitate and don't know what to do.
Bonner worked against the Lakers because D'Antoni doesn't play defense. They don't actually have defensive rotations, and they don't really care about that end of the floor. Golden State has already shown that with a minimum of effort Bonner becomes a liability. Memphis is actually a top defensive team, that can make you pay for playing a guy like that.