Flying is increasingly a hassle. And, apparently it’s worse if you carry cash.

In March, a man was stopped by TSA agents in St. Louis because he was carrying $4,700 in cash. An employee of Ron Paul’s campaign, he was returning home from an event where he was responsible for the proceeds of campaign materials. TSA agents detained and questioned him for half an hour. When he repeatedly asked what scope of authority the agents had to hold and question him, he received no explanation. In fact, the situation escalated to the point where the agents placed him under arrest. Thinking fast, he recorded the whole incident on his iPhone.

The ACLU is now filing a lawsuit against the Department of Homeland Security, which has authority over the TSA. The lawsuit maintains that the TSA is subjecting Americans to unreasonable searches and detentions.

TSA officials have the authority to conduct safety-related searches for weapons and explosives. According to the ACLU’s lawsuit, TSA agents are using heightened security measures after 9/11 as an excuse to exceed their search authority and engage in unlawful searches that violate the privacy rights of passengers. The lawsuit also charges that unconstitutional searches and detention by TSA agents have become the norm.

We can hope this lawsuit will result in some serious regulation overhaul within the TSA. Getting from point A to point B is hard enough without constantly having your constitutional rights trampled on. In the meantime, if you’re going to travel, use credit cards or remember to have a voice recorder program on your cell phone.

Of course, if you really want to remind the TSA about your rights, you can carry the Bill of Rights – Security Edition when you travel. These metal cards have the First Ten Amendments to the U.S. Constitution printed on them, with the Fourth Amendment highlighted in red. (That’s your unreasonable search and seizure protection for those who don’t remember history class.) Power to the people!