&gt; As long as its a webcam-per-suspect-per-place-of-business basis and not a mass grab to do this across entire geographical areas it seems fine.<p>Fine without a warrant, or fine with a warrant, and why?<p>The argument against &quot;a mass grab to do this across entire geographical areas&quot; tends to be that it is both unjustified (no specific suspect&#x2F;specific case) and that no such warrant was (or can be) issued. Law enforcement tends to dodge the issue with a &quot;no warrant required&quot; claim. But if we want to make judgements about what is right or wrong, I think it&#x27;s important to separate these different aspects.