People who actually value personal freedoms understand that there are always tradeoffs: you cannot simultaneously have freedom-to-bully and freedom-from-bullying. It's a difficult problem. People who claim it's simple are not actually interested in solving it. The people who say that freedom-to-bully is infinitely more important than freedom-from-bullying (as all "free speech absolutists" are inherently claiming) are, quite obviously, bullies that want to get away with bullying.
> I've never seen a counterexample
Perhaps that Voltaire's "I disapprove of what you say, but I will defend to the death your right to say it" was made too much in jest and didn't really correspond to some real events, before or after. Or people like Vaclav Havel, who got to the power from the power's opponents, didn't have opportunity to refrain from silencing a political adversary. I don't know.
Which is petty and stupid. But AFAIK he has not censored political content he disagrees with, so I much prefer it to the previous regime.
> but you're not free to call me out when I do so
in the GP post, literally or in meaning. So... I think you're at least exaggerating too much, at least in some places.
However I do see your point.