The likely chilling effects are obvious to me. Who’d want to (intentionally or accidentally) tap a button on this site when someone’s gonna post your username for it?

Punishment for using default features is concerning for a platform. If we needed thought police they’d probably make downvotes more visible to us.

We can already keep bad content in its place by downvoting it ourselves. We can use logs to investigate brigaging and stalking-to-downvote and suspicious mass upvoting, etc. We owe other users restraint if we want them to come back.