Assume you are in the legal profession based on your post...What's ridiculous about warning a guy to not discuss accident details (especially self incrimination) on social media? I was trying to be helpful. Any generic pamphlet from your insurance company will tell you to get witnesses, pictures, party information and not to discuss the case with anyone not connected to the case.
You might think the officers make a determination but it's the insurance companies that have the most say in how to proceed with the case. Many times, citations are not issued even though fault is pretty clear.
Your right it doesn't change the facts but when you admit blame it can change outcome. Insurance companies comb through the social media sites and look for this very type of information. It seems that a lot of folks love to chronicle every time they fart on Facebook.
I think it's fine to share photos, your recollection of events and how everything went with the situation. I think it's dangerous to admit any kind of blame, regardless if sarcastic or not.
I could site some cases where social media posting came back to bite the publisher and changed the outcome of the case but I'm done with this thread.
Remember I was just offering friendly advice, nothing else or no other agenda.
I am not but have seen and heard that though the law is black and white, insurance companies skew these to every shade in between.
If I was the OP I would delete the thread and restart it with no details or factual comments relating to the accident.