The problem with talking to the other students is none of them care, as far
as I can tell. I mentioned before that the culture (for lack of a better
word) of this university is terrible; nobody cares. I once mentioned the
topic of free software to one of my classmates outside of class; I suggested
she try LibreOffice instead of Microsoft Office, and all she had to say was
that it would go over her head (something like "when I get home, I'm going to
be thinking, 'what was that thing he was talking about?'").
Most importantly, I really have no clue how to talk to many people
(preferably all 20-30 students in my class, at least) about the issue
effectively, so that some people will think about it. As far as I'm aware, I
have no way to know their E-mail addresses or even their names without asking
them personally, and at that point I might as well explain free software to
everyone individually, especially considering how weird it looks to ask
someone for their E-mail address so randomly. There is a short amount of time
before the teacher comes in when most people are in the classroom, but I
can't think of any way to take advantage of that.
I can send an E-mail to every professor, though, and I intend to do that.
What exactly I say depends on my professor's answer to my question (about who
makes the decision to use WebAssign; professors, or some single authority).