And that's great, so long as the government remains trustworthy. But then one day you have a government that, say, starts mining the IRS databases to pass that

And that's great, so long as the government remains trustworthy. But then one day you have a government that, say, starts mining the IRS databases to pass that information along to ICE for arrest prospects... Once it's recorded, you not only have to trust the current government, but all future governments as well.