You are overlooking some important points, particularly in undergraduate courses. Those students are generally coming from public schools which teach less and less about anything. Such students know little about US history and government. They are ripe for anything the college profs feed them. Your statement about changing courses doesn't work either. Degrees require mandantory courses taught by the same instructors. There is no escape that way. Brainwashing by liberal professors and CYA by weak administrators is being exposed and challenged. Taping in classrooms has been an acceptable for a long time. The current opposition comes from those guilty of abusing the power of grading to stifle dissent.
I still think it sucks. I think people should be able to say what ever they want without some body saying I will tape what you say and then give it to people who want to control what you say. There was an quote by a guy who said I don't aggree with what you say but I will defend the right to say it. I believe that. If the professor says a lie then call him on it.