When the whole comment section is swinging, keeping your hands down takes more strength.

A pile-on creates a strong pull to join, partly because agreement is free and partly because it feels like taking a side. Adding your line changes nothing about the outcome and places you inside a crowd whose judgment you have not examined. Staying out of it is not cowardice; it is declining to lend weight to something you cannot verify.

Before typing into a swarm, ask whether you would say it to the person directly with your name attached. If not, close the app and do something else for an hour. Silence is a legitimate position and it usually ages well.