Today there seems to be little to no outrage over a Wisconsin's court decision that allows GPS tracking of any suspect in any case without a warrant. With this GPS tracking leaves other warrant-required surveillances and joins plain view searches.
Without getting into the politics of right and wrong, this court decision seems only possible in a post-9/11 world. The public and courts realize questionable measures within a grey zone have stopped attacks and kept people safe. Because of this the public is more likely to be willing to sacrifice some liberties in exchange for safety. Without 9/11 and its fallout I would expect there to be alot more outrage. It will be interesting to see if there is an effort later on to pass laws to prevent this as well as other grey matters the more the domestic front of the War on Terror fads in the public's mind.