Stopping using Facebook is easy. Stopping being used by Facebook is just as hard if not more.
Facebook has its spyware embedded in the majority of apps out there, most companies willingly share their customers' personal details with them for ad targeting purposes and Facebook uses social engineering to trick people into sharing their contacts list which includes your details.
Well, it depends who you ask. You can stop using FB, but not using Google products, even passively. is practically impossible.