Actually, last time I checked "US Courts" just applies over "US Citizens", and by the IP mtgox is displaying I get this:

201.191.115.114    CR    Costa Rica    03    Guanacaste    Liberia       10.6333    -85.4333    Instituto Costarricense de Electricidad y Telecom.    Instituto Costarricense de Electricidad y Telecom.

So... unless Costa Rica is the 51th State, whatever you came up with about "US Courtrooms" voids. "US Courtrooms" are however cool for funny and joke cases:

«My neighbors' kitten shitted in my garden and I want 5000 USD compensation»...

For the notice; I'm European. So I wouldn't have a reason to visit the US's Courtrooms' Freak Show