This is rather disturbing. Is DHS monitoring Americans' Twitter accounts and can one's posts put one on the no-fly list?

Regarding using one's name as a Twitter username --

If you have a common name (and "Leigh Bryan" is a fairly common name: Facebook alone finds over a dozen) and are visiting the US, you could be detained and sent home solely on the basis of a Tweet (I love how the DHS report calls it a "Tweeter account") that may not even be from you?

Remind me again why anyone would ever want to visit the United States when there are so many wonderful places to visit in the world?