For a back-up QB??? No, not worth the risk. Most of us bleed black and gold. The locker room may be different in that the priority may not be the team (although Ben has already weighed in) but in their own self-preservation BUT they will be NO different in that some will be dog lovers and find Vick's past and the fan reaction too controversial for the associated gain. He is a Back-up QB, after all.
The only thing about this argument is we are now what 5 or 6 years into his reinstatement and this has never ever been a reported issue anywhere... heck in a few of those locker rooms he was supposedly one of the better influences... The guy was an *******, maybe he still is, but he paid his debt and got his second chance... whether he is signed or not wont change the past and it wont save a single dog anywhere. I see a lot of moral outrage over long spilt milk.