@alxd No to Fedbook, we really need to stop accepting it as a necessary evil for organizing before it's used against us
As for a logo, have you seen ? I made it to be a solarpunk symbol, and it's so you're free to use and modify it as you please. Larger version and variations here: https://wiki.sunbeam.city/doku.php?id=solarpunk#unofficial_flags_symbols_-_add_as_you_please
Sunbeam City is a Libertarian Socialist solarpunk instance. It is ran democratically by a cooperative of like-minded individuals.