And your opting out of the network makes it a little less valuable, since now no one has access to updates about yourself. If you can convince a few more people to lower their exposure or to move to something like friendica then the network becomes even less valuable and helps to lower Facebook’s power.
I would much rather fight the problem this way than trust legislators to come up with a fair way to regulate it. Same with sugar, I would rather invest in educational campaigns to convince people how bad sugars and sodas are for their body than have the government ban all sugar or decide how much can be in a product. The lobbies will usually end up writing the final laws anyway, and who knows what their incentives are.
I’ve been off of Facebook for a decade and still have a robust, satisfying social life. My real friends know how to contact me and I never feel left out of the actual important stuff going on. I think of Facebook’s existence as a blessing: it allows me to easily filter out all those low-effort “events” run by people who don’t really care if I come.
Not sure how email solves that problem.
I mean, to be fair, even Facebook won't necessarily tell you about an event unless the event creator pays them money to promote it. It's actually not a great platform for small-scale publicity, and _only_ publicizing an event on Facebook is clearly a mistake for a number of reasons. But despite its many virtues, email doesn't actually address GP's case at all.
There isn't a passive tool that would solve this other than getting people's email or mailing address, and that's absolutely fine since if you wanted to go to these reunions and be invested in these events, you can send an email to the school and get yourself on this contact list.