<blockquote>Innocent pilots who have been targeted for search but not charged with a crime may never get an opportunity to challenge a potential violation of their constitutional rights in court, since there is never a trial in such cases, and civil action against the federal government is cost-prohibitive for most.</blockquote>
via <a href="http://www.aopa.org/News-and-Video/All-News/2013/June/19/AOPA-demands-answers-on-aircraft-searches.aspx">AOPA demands answers on aircraft searches - Aircraft Owners and Pilots Association</a>.