"We do this routinely."
Source: FAA spokeswoman Laura Brown. General
Motors has asked the FAA to remove a leased Gulfstream IV from the
agency's public flight tracking service, which allows services such
as FlightAware.com to display flight information for anyone to see.
Such practices are fairly common among business operators... who
usually don't want curious onlookers (or shareholders, or the
media) to know where their executives are traveling.