Russkis learned their lesson many years back.If you're going to bang that drum you're going to get very boring during this competition. I suspect the only racially pure team out there is probably some stone age nation like Russia and even they have foreign coaches.
The Russian national side was expelled from qualifying for the 2003 Rugby World Cup, due to eligibility issues. Spain, who Russia had beaten in qualifying, protested the fielding of three South African-born players (Johan Hendriks, Reiner Volschenck and Werner Pieterse), whom the RUR claimed had qualified through ancestry.
Later they had very strict rules - had to speak Russian, and be Russian Orthodox.
Adam Byrnes of the Melbourne Rebels, played at RWC 2011.