So… the Romans just stood there and watched?
The nature of how this system works, with NO thrust or credentials, means the shills can bake and will on occasion. The alternative is to setup some sort of login process and background (post history) check. This will be no match for a group who have infiltrated every major western intel agency. And it will create a false sense of security among the anons. Bad idea.
The reason why 8chan is the perfect place for this is that there is NO trust. We are constantly suspicious of everyone. This is the only way to fight the clowns. It's the same, as it should be, with regular poster and bakers.
No false sense of security. An occasional shill baker keeps it that way.