⟳ Репост от Jill
it costs small but nonzero amounts of money to maintain them, and a bunch of them are still activated by DTMF tones over a radio link which means they’re liable to be messed with by random people with VHF radios, leading to headlines like this: www.zdnet.com/article/expe...
Here's how a hacker set off Dallas' emergency sirens last weekendAfter an unknown hacker targeted the city of Dallas' emergency siren system, other cities may be vulnerable.www.zdnet.com