[burritas]

Don't underestimate meth heads looking for copper. I knew a power company employee that told me there were more than a couple of incidents of a tweeker getting fried at the local sub station after they scaled a 9-foot wall covered with warning signs, topped with razor wire, and monitored by a few security cameras...presumably with the notion they'd get a whole lot of copper out of there while everything was energized.

[BLKNSLVR]

This highlights the vulnerability beautifully. If your random meth-head can get close enough to do some amount of infrastructure damage (frying themselves or not), a coherent enemy, mis-guided or otherwise, with time and resources to plan and execute, could do exponentially more.

But maybe drug-seekers are more crafty than I give them credit for. They're probably amongst the most motivated of humanity to reach their end-goal, so maybe it's not as good an example.

"If you want a problem solved, tell a meth-head there's a score in it for them if they succeed"

[burritas]

If terrorists farmed out work to meth heads I'm sure we'd see some creative solutions for spreading mayhem. A lot of those guys are very familiar with critical infrastructure.