There's also an argument to be made, that cookie makers want you to keep eating cookies, just like Facebook wants you to keep "sharing". Facebook has an advantage (living on a device you obsess over), however those cookies you hid on top of your refrigerator ... are they whispering to me?
That is another way to do it, but it might not fit many people's lifestyles as well intermediate measures like deleting the app. Facebook is a communication channel, just like email and the telephone, and totally deleting your account has definite costs that vary from person to person. I think it's totally fine for people to manage how they make their own tradeoffs, and I know for a fact that the most extreme action is often more than is really required to get resuts.
Take myself, for example. I'm quite anti-facebook and hardly ever use their software. But I haven't deleted my account because I have friends and acquaintances who still use it for event planning, and I don't want to be either left out or be a prima donna demands special treatment. I get an email notification when I get an invite, and I only log in to RSVP and check the event info.
In practice, it means signing up for another service for most people. Social penetration of Meetup/Evite/etc is far lower than that of Facebook.
I could use one of those to plan an event, but there's no way that I can force people to use them to invite me to and event they're planning instead of Facebook. If they choose to use Facebook, I'm not getting an invite unless I have a Facebook account.
My solution to that problem is to leave up a vestigial Facebook account that I never use and very obviously communicates that I no longer use the site. It contributes to the impression that Facebook use declining and ensures I won't miss anything.
I don’t remember the last time I’ve logged in to Facebook (over 7 years ago?) and I assure you my social life is more robust than ever. If you don’t like Facebook or what it’s turning the world into, the only thing stopping you from quitting is yourself.
I have a very active social life, and have never been on FB.