Stop reminding them, and let them watch you tear up the no-name assignments and throw them in the trash.
Give the offenders zero credit for those assignments...
Stop "suggesting", and start telling them what to do. When they fail to do that, give them no credit for that assignment...
Have you told them not to eat in class?
If not, do it, and then fail the first person who does it. Fail him for the entire semester.
Others will fall in line...
Please refer to breakfast notes...
Please refer to lunch notes...
Where in the Hell did they get the silly idea that deadlines were negotiable?
They're stupid. Fail them...
What's the mystery here? Scribbled notes are not an essay. Fail them...
They're stupid. Fail them...
What's the point of an easy test? That very idea is silly. Give them difficult tests and, when they do poorly, fail them...
Based on what? From the sound of it, you've got a student body made up of blockheads...
If I may speak frankly, it sounds as though you're allowing the students to dictate the terms of their education.
Stop doing that.
You're the professor, they're the students. You make the rules, not them. When they fail to adhere to the rules, they need to suffer the consequences, and those consequences need to be severe enough to capture everyone's attention...