And we know numbers are inflated because, and I'm sure this applies to most of us, I personally know many people who have made multiple Facebook (or insert other platform) accounts for various reasons...
I actually found that Facebook was very helpful when I forgot my password after being away from it for a few years. They simply deleted my account and refused to let me make a new one. It's always nice to have someone to support you and keep you honest when you are thinking about backsliding.