I suspect that the energy required scales exponentially though, and, eventually, it might just become less of a hassle to just behave.

That and the fact that each increase in difficulty filters out people that do not have the capability to pass it. So the pool shrinks every time.

Though, valid counterpoint: Eventually prefabs emerge and get shared.

But then we innovate once more. We always did. We always will

Meanwhile, as said, well-meaning people get essentially harassed and silenced for allegedly being trolls if they are not aware of all the intricacies and differences in how people may view some words. Or they just make a mistake. That may push them away, but there will likely be room for different kinds of spaces and different kinds of cultures, just like today.

It doesn't scale exponentially. Another user already gave the example of someone persistently using "he/she", talking about gay marriages as "partners" while straight ones are "husbands" and "wives", etc. How much effort do you think it takes to perform that versus to moderate it?