Go get involved and you’ll see pretty quick how people generally handle organizing. They’ll be some kind of low stakes event like a reading or art gallery or concert or something and people will say “come out to this protest tomorrow”.
If there’s a signal or something it’s not usually a necessary link.
All that is to say: don’t use computers to organize. If you want to use social media to raise awareness of an event that’s a different thing altogether.
You can’t use xscreensaver on wayland.