The community can make OT for any shred of a thought or of a lesser structured General discussion. To solve this, just do a poll. "Do you want "shitposting" to stop in OT?" Then depending on what y'all decide, you have to actually enforce it coercively. Otherwise, the poll and and a thread stating an opinion for the direction of either side of the argument, such as this, is useless as both sides will still exist pestering each other side.
Collectively better decide what you want for OT/ come to an agreement, then enforce said ideology.