I tried making one a year or two ago. When it asked for a phone number I gave a throwaway. Turns out they verify you have control of the number, so next I tried some VoIP digits. Facebook knows which blocks are owned by the larger VoIP companies and requested a _real_ phone number this time. So...I went out and bought a damned phone so that I'd have a phone number to make this bloody account. I verified that I could make and receive calls and started their registration flow again to be blocked by some other kind of BS (I think they thought the number was still in a VoIP block...guess that misfeature isn't perfect?). Anyway, it wasn't thaat important to me, so I gave up and haven't tried again since.
Try being an actual account with a Native American name. Facebook likes to randomly ban them accusing the owner of using a fake name. So, yeah, people around here sometimes have problems keeping an account.
I had an experience with Facebook locking my account once, and I came to suspect that they were doing it to punish me for logging in on a mobile browser to promote the app. The UX really seemed to be designed to be painful - interfaces where the buttons were just out of reach unless you scrolled a particular way, scary language implying it was unsafe to use the site that way. I felt like someone was getting a bonus based on how many people they could push off the browser into using the app.