said by DavePR:You can listen radio and TV stations. You can monitor Ham radio operators. You can print out NOAA weather maps. You can listen to planes in the air ans ships at sea. You can listen to public servants such as Police, Fire, USCG, etc. (except encrypted).
If you listen to an FM station's SCA without permission you have broken the law. If you listen to that station's Studio Transmitter Link on 948 MHz you have broken the law. If you listen to you neighbor's baby monitor on a scanner you have broken the law.
Interception means receiving a two party communication when you aren't either of the two parties. The connection between my router and my internet appliance is a two party communication, on a non public service, non broadcast, non amateur frequency and therefore I am afforded the protection of ECPA and other wiretap statutes against the megalomaniacal Google.
unless it is set up to public access.