Good going for those who have got this working and are willing to take the risk
Personally I'd leave this well alone, if I were writing this beta I'd have debug code in there that would be feeding back data to a server somewhere monitoring various parts for performance, errors, etc. At the very least I'd be logging the MAC / serial of each console connecting to the network using the FW. I've done it in the past with beta firmware and Sonys engineers are far cleverer than me lol.
Mind you that's not to say they will take any action or even notice, they may not have systems in place to flag consoles not in the beta, or even care! Guess we will find out sooner or later