The GAO thinks Brady is a joke...
A team of Congressional special agents was able to bypass Brady Act background checks and successfully purchase firearms using fake IDs in all five states where they tried, according to a March 19, 2001 General Accounting Office.
The investigation was conducted by the General Accounting Office at the request of U.S. Rep. Henry A. Waxman (D-CA), ranking minority member of the House Committee on Government Reform.
Agents purchased firearms from licensed dealers in Virginia, West Virginia, Montana, New Mexico, and Arizona from late October 2000 through February 2001. All five states conform to minimum requirements of the Brady Act, relying on instant background checks, but do not require fingerprinting or waiting periods for firearms purchases. The gun stores and pawnshops visited were selected at random from the yellow pages of local telephone directories. The investigation was conducted in accordance with investigative standards established by the President's Council on Integrity and Efficiency.
State-level background checks required in Virginia and Arizona also failed to catch the fake IDs.
Based on their investigation, GAO concluded that in the five states, "the instant background check does not positively identify purchasers of firearms," and that it "cannot ensure that the prospective purchaser is not a felon."
According to the report, "the instant background check does not positively identify purchasers of firearms. Rather, it is a negative check that cannot ensure that the prospective purchaser is not a felon or other prohibited person whose receipt and possession of a firearm would be unlawful."
Fake ID's Foil Brady Checks - GAO