So a major entity advocating for it twigged my newly-developing COINTELPRO BS senses.

Leftist organizers smarter than I have pointed out how dangerous & divisive that advice is on several fronts (tripping/trampling risk of suddenly sitting down, wasting energy self-policing instead of focusing on actual goals & threats, mob mentality turning on individuals, etc).

Hypoautonomic didn't point out the thing that raised my eyebrows recently: altnationalparks' reposting of the proposal that peaceful protests have monitors with vests & whistles, to get everyone to sit down so the cops will "take out their aggression" on the instigators/bad actors.

Read through most of the linked thread. They have some good points & some iffy ones about what may be going on & who may be running things.

As multiple commented pointed out, altnationalparks' impact has been largely positive. they've been good at motivating engagement.