First time I heard "No one likes us" was around 1981, only a few sang the "second verse" and the rest of the surrounding crowd burst out laughing, but it soon caught on during the game. It was sung as a slower tempo in those days.
I've been going since 1980, when I ten, there was always a pitch invasion at the last game of the season, but only by the fit fans who could camber over the fences (unless you were in the seats).