One thing you can do is to make the thread self-moderated. That way you can delete all the sh*tposts and save the moderators the extra workload of doing it. Sometimes it is still possible to have a thoughtful and informative conversation on this forum.
in my local board,account farmer still can make a normal thread to make a place for their another account to spam there but unfortunately their thread seems legit to discuss. and they still have off-topic and altcoin board to spam post