I don't necessary disagree with you, and generally lean towards the 'marketplace of ideas' / free speech side of things. But a few thoughts that make me hesitat

I don't necessary disagree with you, and generally lean towards the 'marketplace of ideas' / free speech side of things. But a few thoughts that make me hesitate: 1. not deplatforming is based on a belief ("sunlight is the best desinfectant, etc.) that, as far as I can tell, isn't supported by much evidence either, at least as far as it's larger-scale effects. 2. it's possible, for example, that having these ideas out in the open and easily accessible actually increases the effect of them radicalising/convincing people who previously didn't have much of an opinion on or care about these issues. This might outweigh the effect of those already radical being exposed to alternative ideas. 3. building on this, I find that generally the 'better' and less hateful ideas are more nuanced and complex, and thus much harder to convey. Especially in online environments like reddit/twitter/etc. 4. there's the 'bullshit asymmetry principle'. it's much easier to produce bullshit arguments for bad ideas than it is to counter them. it also strikes me as much easier to get ensnared by hateful and/or bad ideas than it is to 'escape' them. A bit like how cults work. 5. access to these ideas via Reddit and the like removes one rather important element: collective shaming and having to accept the consequences of particular ideas. While in theory this is a good thing, in practice it can easily lead people down dark paths in isolation. Having grown up deeply religious, and having spent a lot of time in all sort of fringe communities, I suspect that the net effect of not deplatforming is negative. Ideas are perhaps kind of like viruses. With the internet and places like Reddit, they can propagate freely without the mediating effects of interpersonal contact and various degrees of ostracism or other consequences. They also have a reach that they never had before. Despite all that, I'm not arguing that we should do something about it. I don't know, and still lean towards accepting this new reality with all its consequences, or at least making sure we have a better understanding before we 'curb' things. But I'm much less optimistic about this new, internet-enabled state of things than I used to be. Apologies for all this being a bit of a ramble.