I go to a small college where classes range from 25-35 students. Every class I have this semester, the same people are routinely late. Let's say class starts at noon? 12:15 people come in and make that same "eep" look on their face like they're just trying to get to their seat. Once in a while, everybody is late. But the same people are late all the time. It's distracting when you're trying to learn and somebody is fiddling with all their stuff, getting their books out. In one class I had, the same guy would be routinely about 20-25 minutes late and it was funny to him. I'm the kind of person who tries to ignore others, but this is getting seriously annoying. Today, a professor from another class wanted to share info for us, and people kept walking in late, walking directly by him and sitting down like it wasn't a problem. Should I say something to these people as they come in? To the prof, asking them to just lock the door when the hour starts?