And now (as I was interrupted before) I also read the footnote, which explicitly mentioned the German "Deppenapostroph", and that he learned "idiot apostrophe" from a German. Well, I am pleased!
Actually the German Deppenapostroph can be used with a pluralisation, or with a genitive (which does *not* have an apostrophe in German), or with something else. The worst I have seen was in "nachts'" (lit. at night), where it is particularly absurd.