That's why I used iron as part of a joke... iron levels can actually be high within a human being and it can be unhealthy. But hey, didn't expect many to get it... education seems optional nowadays.
Honestly, I have those saved to my computer's "Notes" application, so that whenever I see grammar I don't approve of, I can just post those five links. That way I don't have to bother looking them up again and again.
Oh my gosh
https://i.ytimg.com/vi/IZr8xxYXKJ4/hqdefault.jpg
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRjnrbcyjA4PbK0o3V-PlMugrVQ0Sz5hEx2LKg_8PXzE5-wx8lEQw
http://tusb.stanford.edu/wp-content/uploads/2012/10/grammar-vader.jpg
http://rickmcnary.me/wp-content/uploads/2014/01/grammar-nazi_00250146.jpg
http://www.nineteenletterslong.com/074/grammar-nazi/grammar-nazi.png