@darius Dropping OP to quibble—I think this comes down to what "safety" is.

My unproven sense is that adding friction to pile-ons in this way sharply reduces the intensity and volume of pile-ons, mostly both because casual trolls and especially the randos they recruit are lazy. (Also it's a signal to reasonably rule-abiding arguers that argument isn't welcome.)

I think reducing volume + intensity is a real plus for psychological safety and well-being rather than "feel good" (derogatory).