This was started by Dave Smyth over on the bird site:
Not to Pixels
Protest site for people to push back against tracking in most marketing emails - 99.999% of the time the senders have no consent for and is not permitted under PECR legislation in EU and UK.
No to pixels provides a template for complaining to the UK data protection regulator ICO, but could probably be adapted easily enough for a lot of other countries.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!