This is the same sort of removal of ideas from the marketplace that you are talking about, it's just probably not one you want to use as a test for what you have articulated.
That said, even in the example you give it is not always considered appropriate to remove people causing disruption. Consider, for example, a conservative speaker giving a guest lecture being protested against -- often loud enough the the lecturer needs to shout to be heard by his audience, even though protesters are outside.
Here is a relevant video of Ben Shapiro giving a lecture at Penn State: https://www.youtube.com/watch?v=JLpa6fsTxCA
What about a public park that has gotten ruined because someone keeps on doing donuts with their motorbike on the grass? A library whose books keep on getting ruined by certain people?
Even public services need to have some maintenance to not fall apart. There's a reason we call 4chan moderators "janitors".
At that point we are discussing the rules about when it is appropriate to have private controls on speech rather than our outrage at someone having a private control on speech.
Twitter's attempts to "police" its users has been both a failure and damaged the reputation of the platform.