New report by FIRE and the news is not good:

More than three in five students (63%) expressed worry about damaging their reputation because of someone misunderstanding what they have said or done, and just over one in five (21%) reported that they feel a lot of pressure to avoid discussing controversial topics in their classes.

Twenty-two percent reported that they often self-censor.
Roughly three in five students reported they would feel discomfort publicly disagreeing with a professor about a controversial topic or expressing an unpopular opinion to their peers on a social media account tied to their name.

At this link, you can download FIRE’s brand new report.