"I completely disagree with what you say, but will defend to the death your right to say it," is a quotation from Evelyn Beatrice Hall, later credited to Voltaire, and later yet to Winston Churchill. Speakers' Corner in Hyde Park in London used to feature soapbox orators talking about anything and everything. No-one was forced to listen. Free speech obviously needs SOME sorts of limits, but what are they? There are national laws against sedition, encitement to violence, slander, etc. But is a person entitled to spread plain lies on the internet? Or on a College platform? The former is a bit like Speakers' Corner -- it is a public area. The university stage is a private space, whose representative Students' Council is entitled to 'reserve right of admission'. So what are the limits set by a university college about who may be allowed a platform there? Time is limited, so perhaps flat earthers and other proponents of generally kooky and disproved theories are agreed to just be wasting everybody's. But at what point does the university have to decide that a speaker's views are 'unacceptable' to it's own ethos, and that students should be protected from hearing them? For example should a university allow pro-Palestinian but prevent pro-Israel speakers? This is just one common instance of no-platforming.