I guess they may be let off this fishhook, as teachers are certainly not well-paid

Agreed, mav, but they are also responsible (for their sins) for setting the future standard, which our sprats will deliver back to us!

So I hereby withdraw any get-out clause I may have implied for people who are not well paid. And teachers get a special visit from the Grammar Police just before they've managed to make the first coffee of the day (I can't imagine a more cruel punishment)!
[evil grin]

Fish with a Chip on its shoulder