Grammar Nerd Corrective Labels

I think at this point it's pretty obvious that I am a big ol' word nerd (see here and here for examples), but I'm glad to see that someone else is too. These "Grammar Nerd Corrective Labels" are the perfect way to stick it to grammar offenders. (Ooh, sorry for the bad pun.)

Stickers available for purchase on Dylan Meconis's site, as seen on Brown Sugar Design.

Do you think you'd have the cajones to leave one of these stickers for someone? I know of a few bars' bathroom walls that could use more than a few of these labels (and a censor. And some soap.)...