I get the impression that about 1/3 don't want to be doing the degree at all. Stupid people, why pay the money to sit and be bored out of your skin. It doesn't phase me, although many seem to want me to feel 'sorry' for them. I don't give a s**t for such failures.
Always amazed me too, people pay so much for education and then resent you delivering it to them. And not all my classes were that big, I had a knack (or overlap if you will) for using slide projectors (yeah, this was pre power point) and stuff like that in the American History Survey 101 part 2 class (required, and we know how much people LOVE required classes), so that was pretty well adapted to the huge halls, but the seminars would only be 10-15 at the most, and my 'special' classes never more than 40, so that balanced it out.
But yeah, talk to them in person, how else will they know who you are? How am I supposed to know that Weaselface77 (or whatever the email addy is) is you? And as Cindy said, most of the people I knew/know in the university care for the students as much as they care about themselves. If you don't care, I ain't got the time, if you're really into it, the I have all the time in the world. My wife ran the campus beer bar (back when it was OK to have beer bars on campus) that doubled as a nightclub where she put on some pretty amazing live shows. I worked there, and it was pretty well-known that I spent my summers on the road working with bands, and that I was from San Francisco, and I (as well as my wife) became kind of 'go-to' people on the campus (in rural Iowa) for stuff like coming out and things like drug problems. I'd listen to the drug stuff, and immediately - if not sooner - have them to over to the person in Student Health and Life (known on campus as Student Death) who was trained in how to deal with that. As for the coming out I just thought that listening and being non-judgmental was enough and it tended to be. It's not like after growing up in the SF Bay Area and living in SF that someone being gay was some sort of shocking deal.*
What I'm saying is, that you're professor's already heard this. Been exposed to it at whatever super huge place they went to grad school in. As long as you don't have any bodies buried in your back yard, (and it's not some bible college) I'm sure you will find them open and willing to help. But you have to ask. It's nothing new to watch people going through them changes. Gee, hey you in the Phish shirt with the white girl dreads, weren't you all goth last semester? College is the place for that, and knowing that, I tried to do my best to help them understand that checking things out was just a part of life. And that thinking about things can be good, but try not to overthink it. I never got it much in history, but I know people who taught med stuff and psychology talked about something they called 'med school sickness'. As soon as you talked about a new disease someone in the class was going to think they have it. When you are reading about abnormal psychology stuff, someone in the class is going to think that it's them. And, it might be, it's even healthy, paranoia is only bad when it consumes your life, but in the real world a little bit is a good thing, as it turns out there are people who don't like you and who may well be 'out to get you.' So long as your not hearing voices tell you that.
* - And half of that was trying to convince people that having a couple of 'gay' experiences in college did not mean they were gay forever. Hell, when I went to undergrad we had a bunch of people we called RUGS (radical until graduation) who were screaming left-wing, commies right up until they took that job at daddy's stock brokerage. When I taught we had a bunch of girls that were LUGS (lesbians until graduation). I for one was not shocked when a couple years after college, the young lady who was the most militant lesbian ever, who was head of the Gay-Straight Alliance and all that sent me the nicest wedding invitation...