This used to happen all the time in the 70s . I have a newspaper article- about 1971 I think, and it had South Sydney Croatia. Now the fans of South Sydney Croatia were so bad that they had to ban the Croatia part of their name. The club was told to get their fans into order or the club would cease to exist.
Mind you rugby league fans in the 60s were terrible. I have a report from 1968. Souths played Balmain. Fans rushed on the ground at the end of the game to attack the ref. Jack Rayner grabbed hold of some young toerag and gave him what for.