Just found this post on the Buccaneer - loved the place. I think the use of plastic "glasses" began after a girl stood on a broken pint pot and severely injured her foot - blood everywhere- I was there standing next to her.
I remember unwittingly causing a fight one night when I poured beer over a chap who persisted in putting his hands where he shouldn't - I found it hard to get away from him because the place was absolutely packed - unfortunately I was caught by the movement of the crowd and missed him - soaking another lad who immediately turned around and punched the chap I had missed - a fight then ensued between two groups of men. We left the building.