> Accounts originating from the same IP address would be kept in the same verse.
If it's that easy, then just ban.
But it takes time to evaluate if someone should be banned. Therefore, it is far better to keep people banned as long as possible.
Its not like i cannot just have my "am i shadowbanned" account on my phone ...
Again, it's not intended to be a cure-all.
> it's to delay them as long as possible.
Which is bullshit. You* do not ban people, you do not ban opinions, you ban behaviour.
It is unreasonable to expect a forum can be read and fully managed by the people hosting it all the while not becoming frustrated with malicious users. The only thing that could manage that is a highly sophisticated AI. The alternative to this is to ban malicious posters.
People trolling, people flaming and people posting hate (that are three different things!) may be unwelcome (and this should be stated before) and that's a behaviour. Banning an account won't stop the next. No matter how clever your special kind of ban seems to be.
So when somebody commits a crime, do tell them, "don't break the law" and move on? No, there need to be repercussions like removing them from society, which then becomes a deterrent.
> The point is to keep them busy in an environment that doesn't harm others and possibly frustrate them enough times that they don't want continue.
Which you try to solve technically, but where you won't succeed.
The point is not to solve the issue of malicious posters, it's to keep them at bay for as long as possible. By banning them you have already succeeded and the longer they are removed from the forum, the more successful the ban. However, claiming that you cannot frustrate them is non-sense because everyone gets frustrated eventually.
You may be thinking about the matter in an idealistic manner which is unrealistic. Malicious posting would exist even in an ideal society because it's a form of entertainment. This is a problem with homo sapiens and when we finally evolve to the point where it's no longer an issue then we will no longer be homo sapiens. In the mean time, we can only ban people and the longer the ban lasts, the better it is for everyone else.