I'd like to nominate myself for the prima donna of apostrophe-rage.
Despite (or perhaps because of) having too many things to do, I was so enraged by the apostrophe-abuse perpetuated by my local Sainsburys, that I insisted on walking around the shop with the hapless manager pointing out all the horrors his shop had perpetuated.
This was some years ago, but still, in retrospect, utterly nutty ...