Love the responses here, love are no how everyone jumps on those that prefer their coach to act professional until they can back it up on the field. Personally I thought it was funny, but when your teams losing and playing below expectations, and you are most likely on the hot seat, it might be a better idea to act like a pro and save the humor for later. Rex is already viewed as a clown/joke around the league. Some people prefer the head coach of their team be known for being good at coaching, not for being a clown.
Now if you really want to see overreacting, go check out the comments on other sports sites and read the comments from Pats fans who think Rex should be fined and/or suspended for cheating by pretending to be a reporter to trick Edelman to give away game planning secrets. Like if a regular reporter asked him this it's fine cause it won't spread past Edelman and the reporter.