Getting angry at other drivers causes more problems than it solves. I tend to just ignore them, it's far safer and better for your health too.
The issue here is that there is no context and no offence has actually been committed as far as we know regardless of the picture.
"Driving like a dick" is subjective, the manoeuvre could have been perfectly safe as far as we know, but we don't actually know for sure, and what's going to happen if Red does show up on this forum? They will probably say - "it was perfectly safe" and will continue on their way...
I am not condoning people who do drive like dicks, or defending Red, just saying that this is pointless and one sided.