When you say that people shouldn't have a platform to begin with, do you mean that they shouldn't have places where they have the "right" to say what they want, however hateful, without others being able to do anything about it? I could agree with that.
mango OP wrote
Reply to comment by Ajagapmpjdpp in On deplatforming by mango
I first heard the term from anarchists. Here's an example of an article where an anarchist (Lee Shevek) uses the term.
https://theanarchistlibrary.org/library/lee-shevek-tactics-for-the-fight-against-abuse-learning-from-anti-fascism#toc3