It’s generally not that their arguments are toxic, or that they are being disruptive. It’s more that you sometimes get the people who are just not very effective communicators, and they’re a bit scattered. Most of their posting is fine, but every so often they start derailing a topic with (to use a random example) healing crystal energies. If you just leave them to it, next thing you know theres 30 posts back and forth with them and someone else arguing. Delaying their posts lets them continue to have their say, but really puts a damper on this ability for things to steamroll into pointless back-and-forth.
I’m racking my brain for a good example. The community I have in mind is for a hackerspace, so people are often talking about the specific build of some project. We have some people who like to come in with misguided knowledge on the subject. Say its about electronics, and they mostly understand, but miss some key component of the discussion, lets say an electrical effect. Dunning-kruger comes in full force, and a very pointless back and forth can start.
Post delay helps here. It stops rapid fire back and forth, the conversation usually skips over the disturbance, and their post eventually shows up, and gets its rebuttal in due course. They can still participate but we’ve managed to effectively moderate their unintentional disruptiveness.
The point I’m making is that its not really outright negative behaviour, and it’s not sweeping anything under the rug. These people stick around and eventually learn, or they continue to be a problem and are dealt with more severely. It’s not necessarily silent/passive aggressive, thats really down to the mechanism of the software.