The Military is Spying on Americans

"....officials familiar with it said the N.S.A. eavesdropped without warrants on up to 500 people in the United States at any given time. The list changes as some names are added and others dropped, so the number monitored in this country may have reached into the thousands over the past three years, several officials said. Overseas, about 5,000 to 7,000 people suspected of terrorist ties are monitored at one time, according to those officials."
Schneier.com

Well according to this guys source, it's not 36 people that have had their rights trampled, it's thousands. Where exactly do we draw the line. Is it all right to violate the rights of one citizen, ten, hundreds, thousands. Where exactly does the constitution cut in and out?