Steve, Brendan, Pedagogue … and anyone else I've overlooked.
Thanks for the interesting comments. It's always good to hear what other people think - and to find out what annoys them! I suppose we all have our own particular little bugbears - if we take on other people's, we'd hardly sleep at night.
I was out shopping earlier today and combined this with an apostrophe patrol. I was pleased to discover no striking absences and no glaring misuses.