As the assholes tend to ignore even basic consumer rights if they can get away with it a bill of rights seems a bit pointless.
On the other hand adhering to a published code of conduct which granted the right to put Gamer friendly logo of some sort on you product might not be a bad thing for the consumers. If you could find someone trustworthy to decide who got it..
As fighting a Troll helps everyone attacked by the Troll. Wouldn't the logical thing to do would be be to team up with the others being sued by the same Troll and share the costs? Or does the system make that impractical?