Ladies rooms?

At one of the buildings in Cornell University several many years ago some event of sufficient draw for many non-U people to attend prompted some ad hoc signs to be posted to facilitate the finding of the rest rooms. One of the signs read Ladies' Room with an arrow to point towards the location. Someone, in the spirit of the feminist classic, had crossed out the Ladies' and written in Women's. Someone else, skipping a step, had crossed out Women's and written in Woperdaughter's.