As one poster suggested, several of these guys would likely sign something and send it back to you if you can locate their contact information. However, I would suggest including a letter stating the helmet is for somebody besides a grown man. Good luck!
Judging from his Senior Bowl highlights it's certainly not a device to keep you from overthrowing receivers! Pretty sure Freak answered your question though.
I'm not sure that's a good comparison. This is more along the lines of we currently have a bunch of questionable seatbelt violations and are hoping sometime down the road that the Court decides to deem those tickets we received unenforceable.