Do Spreaders of Misinformation Deserve to Get Banned Permanently?

Twitter announced a “strike system” that will ban repeat spreaders of misinformation after their fifth warning. There is no denying the negative effects that deliberate liars and fire-starters can have on the world. Many of them knowingly use falsehoods to selfishly grow their own platforms. Some deeply believe in the misinformation and their free speech right (depending on where they live) to share what they think no matter what.

Do they deserve to get deplatformed and banned for life? Is this practice serving a greater purpose or introducing a shady gray area where platforms like Twitter get to decide who has a voice and who doesn't? At the moment, it seems the answer to this question might depend mostly on whether you agree with the choices of who is getting banned.