I feel that people to use free speech as a shield want to be able to scream at a random stranger whatever is on their mind without that stranger telling them to

I feel that people to use free speech as a shield want to be able to scream at a random stranger whatever is on their mind without that stranger telling them to f* off. Maybe they don't exactly see it that way, but it seems to be the result. It's like forcing everyone to watch Steven Universe (frankly I don't see the point of that show or Adventure Time, go figure). Anyone worth their salt would see this as a violation of their liberties. Yet, when we look at universities or similar institutions like Twitter some people decide that they must be unfettered platforms for all speech even if it's clearly criminal. I don't see how people make a special case in this situation. Maybe I'm dense, but I just see an institution as a person at least in the legal sense and having all the authority to protect their reputation.