I liberally use that block button. Even to whole communities & instances. Worrying about blocking a toxic user's speech from anyone's view but your own is not worth the effort (unless you happen to be a mod).
It sounds like a mobile app or knockoff GoPro style action cam might work better. That way you can point it out the side if needed and the audio quality is likely to be much better than a dash cam.
For budget dash cams, I've had good experience with the 70mai brand. Keep in mind that on most dash cams, if you get one without a screen, you will probably have to install their app to change settings.
IIRC it mostly stemmed from a lot of US tv channels not being available in Canada at the time. So to make them available, they started hacking satellite descramblers and Direct TV cards. Then they found a giant market in the US willing to buy these boxes and cards to get free tv.
There were people in the US making them too, but the Canadian stuff was more reliable and updated quicker when Direct TV changed codes.
I like these. You sold me on Art of Rally. I've been looking at it for a while.
Edit: I guess I should have finished checking out before posting. Sales off :(