Translation:The bad students write and paint on fences, doors and windows.
I keep a notebook with the right mangled English answer. It’s preventing high blood pressure. Otherwise I feel like throwing the iPad at the wall every time it marks my correct English sentence as wrong and replaces it with some translation software’s idea of correct English
And why are these "bad students" "unruly"? Because they weren't taught in kindergarten like they should have been! This is fallout from all of the kindergarten teachers flying around the city! The education crisis comes out as bad students...or bűnöző (criminal) or - wait for it - visszaeső (recidivist!)
This is referring to a person's behaviour; "faulty" refers to functionality. To say that something or someone is "faulty" is to imply that there's something wrong with them that is keeping them from operating properly (which would usually be extremely insulting to a person). It's almost definite here that if we're talking about students, we're talking about their behaviour and not their capabilities.