Would it be possible for me to block everything posted in it?
I could create a user group access restriction.
That's an idea I've seen work well. On the
forums for Reaper Miniatures they have a subforum for politics that is inaccessable by default, but a user can request access (
description here). Then, if a topic on the main forum goes bad, the moderators can dump it in the politics subforum. It also lets the moderators remove temptation from certain posters (where I moderate, the forum blocks anyone with multiple infractions from the off-topic subforum).