Facebook question please help?

[Steg]

Ok well i made a fake facebook page with a random name for no reason at all and then i logged off like 5 minutes later. I logged back in like 5 months later and some lady sent me a message that said that my fake page was reported to the police and facebook. she said the real girl whos name i randomly made up's uncle is a lawyer. she said the law doesnt take accept bullying and impersonating a 11 year old girl and she said i better shut down the page before legal action is taken. i was like umm ok but i never even sent anyone a message on the account or added anyone. how is that possibly illegal?
Lol no im not trolling, i dont have a facebook but i made one just for fun, and this like 30 year old lady is threatening me, so i was really confused