Until 1992, Apartheid South Africa was put in to sporting, economic, cultural and political isolation by the international community.
This boycott extended to various degrees depending on the willingness of those sectors who were prepared to violate the collective decision to isolate a country which operated a dreadful regime of oppression and racism.
There were some sports and teams who flouted the international quarantine of Apartheid South Africa.
1980 British and Irish Lions tour to that country went ahead despite international condemnation.
The participants in that tour didn't suffer any long term problems as regards their taking part in that tour.
But contrast this with the rebel cricket tours of South Africa in 1982/83 and 1983/84 by a team from the West Indies.
CNN ran a fascinating documentary about those two tours and the effect of those tours both on the tour participants and the South Africans.
The South African cricketers were delighted to get a chance to play against "strength test" touring team.
The South African public turned out in their thousands to see the tourists play.
However the West Indian players who took part in those tours were consigned "to coventry" as soon as they returned home and resentment for what they did remains to this day.
So much so that many of those players who toured SA were forced to emigrate from the West Indies.
Lawrence Rowe who was a superb batsman and who had represented the WI in test cricket was forced to emigrate permanently to the USA as a result of touring SA in the rebel tours.
It should be remembered that at the time the West Indies had probably the greatest team ever in cricket and the amount of world class West Indies players who could not get in to their test team, probably made those players susceptible to offers to play "test cricket" against SA in SA.
In other areas such as entertainment, international acts were paid huge money to play Sun City in SA during that era.
But unlike the West Indian cricketers who broke sports sanctions, international acts such as Queen never suffered any backlash for going to Sun City.
It is very interesting to read the differing reactions to various types of sanction busting.
If you can view the CNN documentary it is worth watching to see the story of how the West Indian players fared in the aftermath of those tours.
Branded a rebel: Cricket's forgotten men - CNN.com