So the not-dumb ones probably also know of the existence of things like this: <a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;Linear-Garage-Opener-Receiver-Remote&#x2F;dp&#x2F;B00283XWUW" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;Linear-Garage-Opener-Receiver-Remote&#x2F;d...</a><p>If you need more than around 200feet of range, a coathanger as an antenna at each end could probably triple that range, a couple of coathangers fashioned into a pair of 310MHz yagis could likely get you several miles range.<p>All for less than a Raspberry Pi camera.<p>Even if you, as a &quot;smart guy&quot; were also a bad guy, would you _really_ consider doing things &quot;the hard way&quot;?<p>The &quot;bad guys&quot; already know reliable ways of long-distance remotely triggering IEDs: <a href="https:&#x2F;&#x2F;www.google.com.au&#x2F;search?q=IED+trigger&amp;num=100&amp;tbm=isch&amp;tbo=u&amp;source=univ&amp;sa=X&amp;ved=0ahUKEwj04daMk8nJAhUlxqYKHSBSCYYQsAQILQ&amp;biw=1175&amp;bih=697" rel="nofollow">https:&#x2F;&#x2F;www.google.com.au&#x2F;search?q=IED+trigger&amp;num=100&amp;tbm=i...</a><p>They&#x27;re using those cell phone we all threw out 10 years ago. (I think I see a dozen or more of my old Nokia 8210 there...)