The tools of Hubski also put those controls directly in the hands of the users with the filter/mute/block options, so ... I really have a hard time visualizing what a "bannable event" might be. (Outside of simply illegal content that could put the site owner and host in legal trouble, or course.)
So I was thinking about SEO spam, and you don't actually need to DO anything about it, do you? It shows up, we all mute them, and ... their posts fade off into oblivion, don't they? They never generate hits or links. We hubskites don't see them. So they really just take up a couple k in the server database, don't they? Do you need to actually DO anything? Or does letting them just wither into oblivion suffice?
There have been one or two people who decide to see how much pain they can inflict given the tools and limitations available. The problem is that "I choose to not interact with you in the slightest" is a choice and assholes will occasionally make you choose over and over and over again. We've had users for whom choosing over and over again became too burdensome.
There were one or two times when this place was inundated with a bunch of dipshits from reddit who just started vandalizing the place. We played whack-a-mole aggressively for like two days and it blew over. It hasn't happened in a long time though--that would have been probably like 8 years ago. I guess they eventually decided this place wasn't worth their time. Fucking locusts.