Not footie related, but I used to live dangerously sometimes and drive down Everton heights on my way to get to Great Howard Street and one evening sometime around '77 or so I'm sure I remember seeing emblazoned along the top wall of one of the Piggaries, in very large letters, the clear and unambiguous message of "Fuck the Pope".
Certainly as graffiti positioning went, it was quite an impressive achievement, visible for many miles, though I think it only lasted a few days or so before the council came along and cleaned it off, it perhaps being just a tad too provocative in such a prominent position.