facejacker
You let someone use your Facebook login or leave it open, and they post stupid stuff on your account without you knowing.
My brother left his Facebook open, and my cousin posted a status that said 'My brother is a weirdo.'
My friend shared her password with her brother, and he posted a picture of her in pajamas at 2 a. m.
I left my laptop on, and my dad posted a message: 'I love my kids.' I was embarrassed.