I think people should pay attention where they post as part of being a good forum member.
That said, a simple fix might be to add a new sub forum called:
“1 - The Basement”
That would show up in the forum drop down list first when making a new post. If unchanged it would punish the offenders, keep crap out of the 3-rail scale forum so their lives are easier, and remove the need for the moderators to do so much work.