Ooooh yes. Something similar happened to me out of the blue back in January. I commented, verbatim:

Random fact that I recently learned and thought was kind of cool. One of the very first responses of your body when you get a cut or infection is to synthesize hydrogen peroxide in the area that signals your white blood cells to rally to that area.

I then linked to Science Daily and Harvard articles about it.

Temporary ban for "Harassment," citing this comment.

Later on I incurred another infraction and my account was permabanned, citing my previous strike as justification for the permanent ban. Smfh. 250 characters to appeal...

Meanwhile these idiots excused cesspools like The_Donald for years. Meanwhile I report a person being objectively racist (Calling them "out of control" and "absolutely feral savages") and... They reviewed it not once but twice and found nothing wrong. LOL.

I wrote this all up in a medium article in more detail but I'm half-tempted to send all my screenshots to Fidelity and some news outlets for shits.