TSA bus station exercise draws scorn from Iowa ACLU 06/16/2011 DesMoinesRegister.com A routine show of force by federal and local security officials has drawn the ire of Iowa civil rights activists, who contend the measures appeared to include broad intimidation of Hispanics. Nico Melendez goes on to call things like this "just a visible deterrent" which is TSA-speak for "show of farce". This was also reported by myabc5.com: ACLU Upset Over Alleged Racial Profiling at DSM Bus Stop
I would not call harassing & demanding IDs from those who are going about their daily business "enforcing laws".