What's worse is when you tell them why they shouldn't vaccinate their kids and they do it anyway and then you end up having to go visit a 6 week old in the hospital with menengitis and not yell "I told you not to do that!" at the parents.
I feel so bad for my family sometimes honestly it's like they're so dumb it's a wonder they can survive and reproduce.
My grandma used to have a sign in her kitchen that said "People who think they know everything are very annoying to those of us who DO!" I sure miss her.