Ken MacLeod did not want to risk his freedom:

Recently, on being asked if I intended to visit the United States some time soon, I indulged in the admittedly cheap crack that ‘I’m staying in the free world until America rejoins it.’ Trivial and theoretical though the risk may be, I just didn’t fancy being in a country where you can in theory be disappeared, interrogated and executed without any trial other than by a military tribunal. It wasn’t something I said lightly, because I really enjoyed all my past visits to America.

But now says:

On the bright side, however, I have no reason for not going to America.

Go read why he changed his mind.