What is the law on using listening devices?

Answer:
You cannot use any device to infringe upon a person's reasonable expectation of privacy. Thus, any place you would expect to be reasonably private, i.e. your own home or car is out of bounds. In a public place, however, a person cannot expect to have privacy.
First answer by Del griffith. Last edit by Del griffith. Contributor trust: 4 [recommend contributor recommended]. Question popularity: 1 [recommend question].