As a strategy, state actors often create misdirection to discredit people who question their ops and false flag operations and maintain plausible deniability.
In that top-level post the OP says it's a photoshop they made. In the subtext link, I like that Hexbear is pretty resilient against the tactics mentioned. We consistently sniff out wreckers/adventurists/judas goats. When one reveals themselves, there's no community effort to rally behind them.
I mean if someone gets banned as a wrecker and they weren't actually trying to be one, they can just make a new account and be less terrible. If they're capable of doing so.
There was this beautiful moment where FBI agents complained that it was hard to infiltrate anarchist groups because they couldn't bribe anyone and had to read theory. I think it's that latter part that makes coming back near-impossible for actual wreckers. If it's just someone with one bad opinion they can correct that, but even if someone hasn't actually read theory there's a bar for having that worldview. Then within that bar there's an overton window of what a revolutionary socialist would say and what a LARPer would say and it's ontologically clouded by their actual worldview. There have been somewhat successful splits like we had over veganism, but I don't think we would ever have the problems that a community like /r/antiwork has the same way /r/chapotraphouse didn't. Our whole subculture is bullying bullies and bullshitters.