Reginleif sent me to this LiveJournal discussion on whether it’s snobby to demand correct grammar in school. A Fairbanks, Alaska elementary teacher saw that the “Parents Lounge” sign was missing its apostrophe.
So, I whipped out my handy marker and was inserting an apostrophe when my principal came along. She told me we must not be grammar snobs. Right, at an educational institution, it’s never good form to actually try to educate.
The teacher saw the sign as an imperative, ordering parents to lounge, while I think it was a general comment about parents’ tendency to lounge.