alt Hacker NewsIn my mind vigilante implies actually doing something to the criminal above and beyond documenting what they’re doing.
“a member of a volunteer committee organized to suppress and punish crime summarily (as when the processes of law are viewed as inadequate)”
That’s from Miriam Webster. I’d say he isn’t punishing crime, I could see an argument that he’s suppressing it, but it doesn’t really fit my normal view of the word.
Running into traffic to pick a fight with them? Throwing your bike in front of their car to cause a collision? Jumping onto their bonnet to try and pretend you're being run over?
The guy is quite literally taking the law into his own hands and it's very clear that running around trying to cause car accidents is making people less safe, not more. In many cases the "accident" he claims to want to prevent is caused by his actions.