There is a difference between supporting increasing the maximum block size and supporting XT. They are NOT THE SAME. Please check again and see if you can find anything about these companies that explicitly state they support BitcoinXT, not just support an increase of the maximum blocksize. Implicit statements such as supporting the max block size may not hold up in court.
Of course, I don't think this will actually work, but good luck.
Good Point, I think it is important that we set a signal that those that have a certain responsibility must make sure that their words are not misunderstood and provide fuel for wacky lunatics.
This is why central bank people read specifically prepared statements.
Either way, if they adopt it and Alice puts in 2015 1 Bitcoin in their account and receives 1 XTCoin in 2016 while Bitcoin is still around, ... we have a case!