I'd be a lot happier if the governments of the world willingly gave up the capability to pull stunts like that. Bit of privacy for the people and all that.

That being said, if governments are going to use large data sifting operations, applying it to deportations (pretty much by definition non-citizens) first is the logical way to do it.

I think it would be nice if this was going to trigger a bipartisan call for small government - but that seems unlikely. I bet any organised opposition decides the real problem is the people who currently run the government rather than the capability of the government.