Greta
We are just too soft. We are also too eager to find excuses for those who misbehave. When I was teaching I wouldn't dismiss my class until they had checked that the floor was clean. Once a boy called out "don't you know we have cleaners?" In other words "somebody else will do it".
I've had that from pupils when made to pick up rubbish. I would tell them that the cleaners were there to hoover up tiny bits of debris such as pencil sharpenings - though they should be in the bin - not balls of paper or paper aeroplanes thrown around the room requiring them to bend down. But they often argued with me about it!
In the end I lost my job as a cover supervisor as I kept a class behind at lunch time to restore the room to a satisfactory state.When I was satisfied with their efforts and was letting them go, 2 students (among the worst offenders) barged past me to leave out of the order I'd decided on. I stupidly tried to stop them and ended up being falsely accused of assault! I was suspended and eventually resigned as I didn't have the support of my head teacher. He was the type who wanted to be 'every pupil's best friend' and he wanted me gone as I was 'too strict'. Unfortunately if parents don't teach their kids how to behave, it is difficult for teachers to make up for their failures!
My only consolation is that I went to a better school where I was happier, though I ended up working more hours for less money and had to claim benefits for the last few years until retirement. The school I left is now closed as its reputation became so bad it ceased to be viable! I also know some of what one of the culprits has done since, which has cost his parents dearly! I have zero sympathy!