After 20 of these tips on how to lose friends, I'm certain that people know JUST how charming you are. Time to get something out of them in exchange for your being awesome.
If they post something about food (and most folks do on occasion), simply comment, "Man! You should send some of that up here to your bestie. At least if you still want to be friends lol."
Then Follow up: "About defriending you: I'm serious. Get some of that food to my doorstep."
Either you lose a friend or.... you get delicious food. There is no way to lose here.
Thanks for reading!