Well, they're just as annoying as the bell

(This is false.)Thats actually illegal.

If the bell doesn't decide when I leave, it can't decide that I'm late.

Why's the dean from community making you stay in class

My first period is Algebra, and my teacher holds us after at least a full minute every day, and my second period is theatre arts which is all the way across the school, so I'm almost always late to second period. Luckily my Theatre teacher is cool and cuts me a break.

if teachers say "i dismiss you, not the bell" then why is there a bell

Ugh I have a teacher that does this, but when I have jazz ban before school that literally end like a minute and a half from first bell he expects the band teacher to give every kid in it a not or something

I think the real problem is people noisily gathering things and running out the door when the teacher was in mid-sentence as the bell sounded. A few seconds of courtesy would go a long way.