Gentlemen, it's ALL about INSURANCE and lawsuits.
If you happen to manufacture ANYTHING and go to the considerable trouble and expense of getting it professionally and accurately tested to comply with whatever standards are required, then you, as a manufacturer have a legal "out" if the consumer decides to modify it in any way.
This is purely designed to save your ass in court if your product fails and/or somebody is injured using your product.
In the case of motorcycle helmets, in particular those constructed using polycarbonate shells, the fixing of stickers/decals/GoPro mounts etc. can greatly affect and reduce the strength of the shell.
This is because some chemicals used in some self-adhesive materials attacks polycarbonate, effectively making it brittle.
Same can be said for most OH&S practices in the workplace: Insurance demands vs employee lawsuits.
It's NOT about safety, it's ALL about shifting the blame to the employee in the event of a workplace accident.
If a workplace legally has it's OH&S policies and procedures in place and employees are suitably trained, licensed, Hi-Vizzed, steel capped, safety glassed, hearing protected, hard-hatted etc. etc. and somebody gets run over by a fork lift - well who's fault is it going to be?
Certainly not the employer.
Sadly, if Michael Schumacher wants to stick a GoPro on his helmet and ski into a tree (as apparently he did), well we all know what happened there and I don't think the helmet manufacturer has too much to worry about.
I can't recall Mr Schumacher (or any other F1 driver for that matter) using a helmet cam in any F1 event. Wonder why?
In summary, here's the product and associated and very expensive legal compliance. Please buy it - but mess with it at your own peril.
As for the over-zealous Policing of helmet cams it should be noted the cop involved was based in Frankston.
There was a bunch of idiots hooning around this area (Frankston North aka The Pines) on dirtbikes a while ago at all hours of the day and night on main roads, freeways and populated suburbia.
Unlicensed, unregistered, unroadworthy, underage and uninsured.
All with helmetcams with their exploits shortly posted on U-Tube for their own personal "hero self-worshipping" and gratification... until the Frankston Police saw them.
Busted.
Turns out one of them was the same reckless idiot who later ran over and killed a woman at the Carrum Downs shopping centre and then cowardly rode off - allegedly.
I can understand why the cop doesn't like helmetcams.
Perhaps this is a good opportunity for a helmet manufacturer to make a cam-equipped Standards compliant helmet?
Preferably one that doesn't stick out like a "giant dildo".
I would buy one because I ride.