I think mduell was wondering why someone would check something like that at all, not wondering why GoPro owner wasn't familiar with baggage liability limits....
Also pointed out CoC limitation, which I didn't perceive as snark, just info.
If it was presented as "Why in heck would you check a camera when CoC clearly states...", then it's snarkish.
I don't check my cheapo Panasonic camera - not out of fear of losing it, but fear it might get damaged somewhere in the bowels of the airport. Just want to avoid the hassle of damage/loss - and who knows? You might have to take a picture of a GA sometime
