Most mods and admin do try to remain impartial on forums. They normally do allow some flexibility in discussions but once the limit is reached, they have to act. There is usually some formal warnings given for acts against the forum rules. If the warnings are not heeded, then a ban from the forum is the final step. In most situations, a formal warning is all that is required.

It can be a thankless task being an admin or a moderator. It's also an unpaid position on the majority of forums.

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Good judgement comes from Experience. Experience comes from bad judgement.