Untie!
Check out The Great Typo Hunt.
Haven’t you always wanted to do that?
Two guys spent three months driving around the USA, spotting errors in signage and educating the sign owners about proper grammar. And the best part: they weren’t trying to be holier-than-thou assholes about it.
(Second-best part: after a Grand Canyon mishap, a federal judge ordered them not to speak publicly about grammatical errors for a year. That’s got to be one of the most bizarre sentences ever handed down.)

Typos sometimes push me over the edge. When one of the companies that advertises at the local movie theater finally changed their ad from “Reserve your’s today” to “Reserve yours today” I cheered. Like clapping and whooping in the movie theater over a retirement home ad.
Though sometimes spelling/punctuation errors can be kind of funny…
http://cakewrecks.blogspot.com/2010/08/perfectly-punctual.html
Oh, those poor children. If you think their teachers are unable to get them to use proper punctuation, I’d like to see the kid that would contradict her/his own birthday cake. That’s a holy source of truth and wonder, that is.
And while we’re on the subject of punctuation, I hope you’ve seen The Oatmeal’s apostrophe flowchart.