Once had a classmate schedule a meeting with me to "go over something" for a project we had together. (Not a CS class, but it was a general education class.)

I agree, make time on my schedule for this meeting.

I get there and they say "Yo I just wanted to let you use my flash drive so you could make some changes to the PowerPoint I started last night. Just get it back to me a few days before the project is due and we'll look over it together."

You asshole. Go fuck yourself.

This lesson taught me to ask what meetings are about in order to prevent this bullshit