This had to be expected. How can they be held responsible for some users posting shit? Did they enroll these users themselves? No, they didn't.
Do you even properly read other input before thinking about your own method again?
...there are some that use bots to manage their campaigns which is horrible.
Why so? If a few indolent managers get banned eventually, the wannabe ones will be more careful and particular in both picking up the job of a signature campaign manager and accepting new participants into the campaign
Mitigation 1: Campaigns run by bots. Mitigation 2: Sign up for campaigns outside of forum. While they keep figuring out ways to mitigate this, we've lost a lot of time and effectively accomplished only minor results.