"People with good spelling and grammar have typo-negative blood."
The meaning of "nonplussed"? The pronunciation of "GIF"? Pedants unite: the definitive vote is here.
"Hi, @justinbieber my name is Maria, I'm 9 and I'm a fan from Brazil, watch out: it's 'we're here' not 'we here'"
Hint: It's never appropriate. Don't be that guy.
They're called the "Tutor Crowd." And they're on a mission to correct all of the city's street grammar mistakes...yo.
I don't know who is responsible for this subtle little piece of editing, but I do know that they are doing God's work.