Not a chant, but a visual impact.
When I lived in NZ in the 70's, apartheid and sport was a major issue. In 1976, the All Blacks toured SA. There was a little protest but not much in a rugby mad country.
NZ then decided to reciprocate and SA were to tour the land of the long white cloud. Naturally, that made a difference to the protesters and mass rallies, which turned out to be very violent, took place.
At the head of the processions through Wellington where I lived, was a massive banner with H A R T emblazoned across it. Halt All Racist Tours. The very large noisy procession took several minutes to walk past. But about 50 yards behind the main body was a small procession with a very large banner F A R T, For All Racist Tours. Maybe immoral and definitely contentious but certainly amusing in its context.