too right I'd use a camera. Already got one in the car, and once I've got the bike serviced and a couple of new tyres, the next spare bit of cash is going on a decent helmet cam.
I'm not interested in recording my ride for posterity, posting up on YouTube, or in being one of those smart-arses who posts up the mistakes other road users make online... can't stand the self-righteous smug people who do that. Funny how many of them cut part of a video short as soon as it looks likes they're about to do something wrong!
For me, it's purely about providing evidence if(when) some inattentive tosser knocks me off my bike, injures me, damages my bike, disputes liability, and think they're leaving me with a very expensive bill... unfortunately an all too common occurance these days. I'm no saint, and no 100% perfect motorist every minute of every day of the year, but going by the standard of driving of many on our roads these days, I have much more to gain from using a camera than I have to lose.
Cameras are already being extensively used in the PCV and HGV industries as well as everywhere else in life. I reckon the next step will be manufacturers offering built-in forward facing recording cameras as an optional extra on cars. In fact, I hope the government legislate mandatory use! I can tell you from experience, that some of the guys I've worked with in the HGV game have calmed their driving down hugely when the boss has fitted cameras to their fleets.
Think of the benefits for the private motorist - proper liability would be established in the majority of accidents, so insurance premiums could accurately reflect the REAL risk. Unsafe drivers would either have to improve their driving pronto, or be priced off the road.