College professors are largely autonomous in their classrooms. They get to set the tasks, evaluate the tasks, and give the rewards.
One should always hesitate to suggest anything to a professor about how to run a gradebook. But today I made a hesitant appeal to some of my colleagues to consider giving incentives in their classes to students who attend an event I'm helping to facilitate.
I spent about 45 minutes composing that email. It's a delicate thing. I didn't want to outright ask them to give points to students who come. I don't have any right. But I wanted to let them know how they could help with our cause, if they're inclined to help. I also needed to make sure they understood I wasn't asking as a member of the administration, but just as the instructor who happens to be working with the students doing this project. The power structure at the university is a very touchy thing, and people can feel coerced or pressured when no such thing was intended.
I sent the email to about fifty colleagues about seven hours ago. So far, no negative responses. No positive ones, either, although one chair replied that he would post our flier. I said in the email that nobody needed to tell me what they were doing one way or the other; if they decide to participate, just make sure they let their students know.
But then, if someone decided to take it amiss, they wouldn't e-mail me. They'd take it to my bosses -- which is why I made sure to run it by them before sending. At least if offense is taken, I can say that it wasn't just my judgment in play.