Comment Re:Do that and lose your CSS key|see my post below (Score 1) 440
In Australia, it would be illegal, to restrict the sales of other region and multi region players, due to Trade practices act which forbids unfair or anti competitive acts. all it would take is a few days and a decent lawyer to get it repealed.
http://scaleplus.law.gov.au/html/comact/browse/TOC TR.htm