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Can you stifle free speech when it's informed by public information and not knowledge of secret activities? That is, if all it's doing is flagging signals it's

Can you stifle free speech when it's informed by public information and not knowledge of secret activities? That is, if all it's doing is flagging signals it's antenna receives, is it even possible for that to be illegal? Also, how do laws treat waves in public (radio, light) - do they get the same "privacy" treatment as people (that is, no expectation of if in public)? Edit: actually since joining/browsing an open WIFI network can be considered criminal...

underbluewaters 11y ago
> Also, how do laws treat waves in public (radio, light) - do they get the same "privacy" treatment as people (that is, no expectation of if in public)? I believe this area is legally fuzzy but courts have determined that police cannot drive around with say, a thermal imager and observe en-mass people in their homes. One could argue that it's just thermal radiation you are viewing from public space.