I wonder if that would be possible today with people being so connected. You can't disappear Americans without people noticing.
I doubt that having twitter would have helped. The public knew and there was significant support for it.
Interesting related aspect of that dark point in history: "The United States Census Bureau assisted the internment efforts by providing confidential neighborhood information on Japanese Americans. The Bureau's role was denied for decades, but was finally proven in 2007.[11][12]"
"Nothing to hide" indeed...
Tell that to those 3 women in Cleveland who were kept against their will for years & years...