A map of all the drone laws in the United States.

The ACLU recently published on its technology blog a list of 28 states that are pursuing regulations for unmanned aircraft systems, or UAS. They're more commonly referred to as "drones," and in fact many of the proposed laws use that exact word.

I dug further to find out what lawmakers are actually proposing. You may click on individual states in the above map to learn more about specific legislation.

Out of the 28 states, 14 are proposing limitations only to law enforcement. In most cases, proposed legislation would make it illegal for law enforcement to use an unmanned aircraft without a warrant.

Some also call for evidence obtained from a "drone" to be destroyed after a specified period. A few ban any government entities from using the technology altogether.