[themitigating]

This would be a good idea but people can just make new accounts. It would also be open to abuse so it would need an appeal system and some sort of judiciary.

I don't understand why reputation isn't a solution offered for spam and bad people. Why not make users on the internet build trust.

[michaelmrose]

For egregious breaches you don't need to give them an appeal just ban them. For less egregious situations client side filtering like adblock doesn't get one either by virtue of people not owing you their time.