That's what the different Lanes are for. Timeless memes with no connection to current events and trends go into the basic autoposter. Funny trendy stuff with recent cultural context go into slowlane. Gets posted more often. And The fastlane is for polticial stuff and jokes that will be old tomorrow.
It's a bunch of ugly shellscripts and cronjobs. I have to clean it up before I put it on github or the code police will arrest me.