Fair question. I post obs from other people's skier triggered avi's (that I've seen but been uninvolved in), from pits/analyses where I've decided backed off, or very small sluffs, block failures, or even naturals I've witnessed. And in full disclosure, I have posted a couple where I made a mistake or missed a terrain feature. Not proud of those. Nobody has been caught or hurt and no 'highway fixtures damaged.'
I always posted for the same reasons these guys did; awareness and maybe it'll help someone else be safer.
Where I live, we are all very quick to MMQB any avi mistakes and the court of public opinion is often way more critical than it is understanding. So like Redacted said, could a 'good' lawyer take all that and spin it up to make it look bad? Yeah maybe so.
So that's my point, just makes me think twice.
Have a safe winter also