@MrsTerryPratchett You're being ridiculous.
I don't think 'Oh, Goody, I've ruined your plans of strolling offsite and hanging round the shopping centre with your mates before rolling home two hours late'. I just think 'You haven't handed your homework in. So you get a detention'.
They get a detention for being repeatedly late. Don't be late, then. Lost your bus pass? Oh, well, if you'd have looked after it properly, you wouldn't have had to walk and would have got in on time'.
Got a bit wet because they dumped their coat somewhere during a game of football and couldn't be arsed to go back and get it? Well, you know how to avoid getting wet next time.
Quite frankly, I don't care enough to feel any glee - I save my caring for kids who are ill, whether physically or mentally, the ones who get repeatedly rushed into hospital at a moment's notice in excruciating pain that will never, ever stop happening to them, that have to be cut about repeatedly and given cytotoxic medication and radiotherapy so they don't die, for the ones who are neglected and abused, who have been forced to secretly work shifts in warehouses or care homes to help pay the bills, who are being bullied or go home to empty houses, make their own food and that of younger siblings, do all the housework, do their homework, go to sleep and get up in the morning all by themselves because the only way Mum/Dad can keep a roof over their heads is to work nights in the hospital.
Secondary school kids who have a safe home, a Mum who works but is keen to give them opportunities and experiences on her rare days off, but who won't take responsibility for their own belongings, right up to squabbling amongst themselves to blame anybody else rather than look for them - and then twat about on their phones rather than doing it - don't get any 'aww, poor baby, bad Mummy for making you understand there are consequences'. I just don't care how put upon they might feel - and yes, it would serve them right if they had further consequences such as having to walk to school as a result of their appalling behaviour and attitudes towards their Mum and their property.