Since when did legal disputes happen where you cannot say you are in a legal dispute?
Ask Twitter. Since gag orders and national security letters became legal:
http://www.ca4.uscourts.gov/opinions/Published/115151.p.pdfIM not saying this is what happened here, but its plausible, particularly if bitfunder/weexchange is being investigated as part of a larger criminal investigation. Think Silk Road, or any of the bitcoin asset scams. Gag orders do apply to this:
http://www.law.cornell.edu/uscode/text/18/2703And its not exactly far fetched to see how an exchange would fall in that category. Would also explain why Ukyo is not able/allowed to destroy ID verification data etc.