If you look at the growth of the no-fly list, 300 sounds like an implausibly low number considering the likelihood of adding-to-the-list whoever is on the receiving end of each call.
No Fly List Statistics:
In mid-December 2001, two lists were created: the "No Fly List" of 594 people to be denied air transport, and the "Selectee" list of 365 people who were to be more carefully searched at airports.
By December 2002, the No Fly List held more than 1,000 names.
60 Minutes reported on 8 October 2006 that the news program had obtained a March 2006 copy of the list that contained 44,000 names.
TSA officials said that, as of November 2005, 30,000 people in 2005 had complained that their names were matched to a name on the list via the name matching software used by airlines.
In April 2007, the United States government "terrorist watch list" administered by the Terrorist Screening Center, which is managed principally by the FBI, contained 700,000 records.
A year later, the ACLU estimated the list to have grown to over 1,000,000 names and to be continually expanding.
However, according to Homeland Security secretary Michael Chertoff, in October 2008 the No Fly list contained only 2,500 names, with an additional 16,000 "selectees", who "represent a less specific security threat and receive extra scrutiny, but are allowed to fly."
I don't know, maybe something happened around the 2008-2009 timeframe to cause the executive agency to start changing the policies regarding the usefulness of lists with millions of names on it... can't quite put my finger on what that change might have been though.
No Fly List Statistics:
In mid-December 2001, two lists were created: the "No Fly List" of 594 people to be denied air transport, and the "Selectee" list of 365 people who were to be more carefully searched at airports.
By December 2002, the No Fly List held more than 1,000 names.
60 Minutes reported on 8 October 2006 that the news program had obtained a March 2006 copy of the list that contained 44,000 names.
TSA officials said that, as of November 2005, 30,000 people in 2005 had complained that their names were matched to a name on the list via the name matching software used by airlines.
In April 2007, the United States government "terrorist watch list" administered by the Terrorist Screening Center, which is managed principally by the FBI, contained 700,000 records.
A year later, the ACLU estimated the list to have grown to over 1,000,000 names and to be continually expanding.
However, according to Homeland Security secretary Michael Chertoff, in October 2008 the No Fly list contained only 2,500 names, with an additional 16,000 "selectees", who "represent a less specific security threat and receive extra scrutiny, but are allowed to fly."
http://en.wikipedia.org/wiki/No_Fly_List