Are you thinking of the Tim Ireland/Alisher Usmanov incident?

But perhaps it is worth speaking the two unspoken codicils:

“We believe in free speech but not your right to abuse our space.

Codicil 1: Conversely, we believe that neither we nor anyone else should be allowed to interfere with a third party to prevent them from publishing your thoughts, however unpleasant or wrong-headed they may be.

Codicil 2: If we misrepresent you, our failure to publish your rebuttal or otherwise to give you the right of reply leaves us open to sound mockery and we expect to be roundly denounced for it”.

Free speech is a liberty, not a claim right: you can’t force others to give you a platform, but you shouldn’t stop others from doing if they choose to do so.