>Randomly bans other completely unrelated users with the stated reason being "spam" when they were on topic and talking about the games themselves with text only posts in completely unrelated video game threads.
Its actually really easy to just threadban for a few days and move on like you suggested. Most moderation tools have that available at the click of a button.
Unfortunately internet moderation is largely full of powertripping retards with a god complex who only care about pushing narratives or controlling communities across the internet. With no actual care about the subject matter the communities are centered around and opting for the nuclear "permaban" option over any perceived slight. Instead of just being referees who only step in when there's a legitimate problem and have the authority to do something about it. Like everything there are exceptions, but they are just that, rare and not the norm.
But I'm just preaching to the choir here like usual.