Righting the wrongs of apostrophe placement

If there's one thing you all know about me by now (and, in the words of the ginger-haired Manc one, if you don't know me by now, then you'll never ever know me. I sat next to him once in the "legendary" Hacienda, BTW. There's one to tell your grandchildren), it's that I'm a stickler for grammar rules. I get particularly peeved by the misuse of apostrophes, and believe on-the-spot fines should be introduced to weed out the worst offenders.

Imagine my joy, then, when my good friend technicalfault sent me this handy guide on How To Use An Apostrophe. And if you can't work out the correct usage of the popular punctuation mark after perusing this picture-plentiful tutorial, I will be contacting the authorities to revoke your A-star GCSEs! I'm serious. This is the power I wield.