I read on the internet a many guides about my problem. I changed my date of birth less than 13 years old, but the button message don't hide. People still send me messages and the invitation add to friend. What I to do? How did they do it (vide: screens)? They didn't change the date of birth.
You can stop friend requests on this page: https://www.facebook.com/settings?tab=privacy but it looks like you can no longer turn off messaging - but if someone is annoying you can block them.
I don't want to block hundreds of people, I would like to turn off this option. One of those people was my friend, who a few days ago had the message button turn on. Still, I don't have contact with her.