if you watch someone who's road raging, they often try to get the attention of their target and they keep getting angrier and angrier and angrier when their target doesn't notice they're being given the finger or whatever.

If you ever watched a forum migrate to discourse, you can see this exact thing play out. I read the blizzard forums around when I played Overwatch for https://danluu.com/overwatch-gender/ and it was exactly as you'd expect. The number of mean/toxic/jerk-y messages went way up.