Throughout all of my years of being on Facebook, I've seen people post some pretty dumb stuff. Some of it I have even done when I was first starting to get into social media. Please be advised this isn't intended to rip on my Facebook friends but to satirise (make fun of) some of the things I've seen. Also the names you see aren't real people.
#1 Posting your phone number.
Yes, I hate it when people do this. Posts like these are just asking to be prank called, harassed or stalked.
The number one rule on the internet (at least for me) is to never give out personal information.
