Who told you that they are not allowed to post their nonsense?
There has been not a single case when Steemcleaners or Hivewatchers downvoted or blacklisted anyone for their opinions. If that is what you are trying to imply. The project does not care what someone writes. There are plenty of users that were reported to Hivewatchers for what they write: all sorts of dangerous cuckoos, terrorists, racists, etc.
All reports were rejected.