Alright, this person is not someone I'd want to live with. People like this are often soaked in their own hypocrisy, and although they are obsessed with your mistakes they are totally blind to their own. Basically, after looking at two pictures on Twitter I can tell you that this person is probably an absolute nightmare irl.
But, that aside, the sheer pettiness of this passive aggressive approach to dealing with messes in the apartment is hilarious. Like the amount of effort involved in writing these cards dwarfs what it would take to just pick the goddamn knife up.