Taking a college class for someone else

Attending school at a fairly large university, I quickly realized how easy it would be for someone to have another person take a class for them if they really wanted to. I mean, if Person A registered for a class, and then had Person B go to the class, claiming to be Person A from day one, it would be very unlikely that they would ever be caught. Granted, it would be very likely that if they were caught that they’d both be expelled, but like I said, I don’t think you would get caught.

My question is, has anyone here ever done this, or know someone who did? If so, did it work well? Did they get caught, or come close to getting caught?

Now, I’m not planning on doing this or anything, it just struck me as someting that would be very easy to pull off, and I personally think it must happen at least a little.

In all my large classes profs/TAs checked student IDs against names on tests. I used to proctor exams and we checked the id number, name and the picture. If the student forgot their student ID we asked for their driver’s license. I’m not saying it can’t or doesn’t happen, I’m just saying that there are some safeguards against it.

I’m a prof blessed with classes no larger than 30 students, but I will weigh in:
ASD is right; there is a lot more checking going on now–or there should be–as to people’s identities. And getting booted out for trying to fake it would be a real drag, so I don’t think it’s worth it even to take the risk.