I have never personally experienced this.  I watched a YouTube video of Schiff vs a Bitcoin proponent, and I was responding to negative comments about Bitcoin with comments trying to educate those people.  One was about “decentralization” when the guy was clearly talking about privacy, and the other was about intrinsic value and business cash flow.  Anyway, both comments were auto removed by the platform.  I was about to say, “unbelievable,” but it is believable.