Make sure to delete VSCode fully from any PC I have access to and annoy all my coworkers to get rid of it.

Moved to Zed and recommended my team do the same.

I would think that the thing to do about it (if you want to use VS Code at all; some people (such as myself) don't), should be to send a patch to prevent adding the Co-authored-by line if Copilot is disabled, so that it will only add that line if the Copilot is enabled.

Turn it off and rage on social media.

If it gets bad enough, look into Zed. Their tagline is literally "your last next editor".