British television was famously not allowed to broadcast the voice of Gerry Adams from 1988-1994. What's lesser known is that it is illegal for British TV to broadcast Australians, and must dub each one.
Andy Kaufman's comedy finally went too far when, in 2016, his character Tony Clifton was elected President under an assumed name. Andy committed to the bit and was secretly appalled and exhausted when Clifton was elected for a second term in 2024.