Statements end in periods not question marks.

Statements end in periods not question marks.

I'm just wondering why so many people keep writing statements- you know brief sentences and end them with a question mark, or even multiple question marks? I'm not on any social media other than this so I'm legitimately wondering- did I miss something? I'm not some expert writer, but it's annoying me like I missed something or I'm not in on it ? come on help me out here. Fill me in??? ?