There should be a novel where a Young Master purges systems from his world.

For example, things like sect juniors suddenly not acting the way they used to after getting knocked on the head (transmigrators), and the YM has to pick up on these little hints to figure out if they're a "MC" and then use a secret system-removing killer technique to purge the impurities from their bodies (this will remove the system).

System MCs should also do things like shout "System, Asspull!" and literally pull something out of their buttocks.

Systems don't belong in our world, so they should be eliminated, destroyed in both body and soul!