There is a piece of vital infrastructure here in Vancouver, that is highly exposed and vulnerable and damage to it could have significant effects. A bit of fencing and some other specific add on's would reduce the risk of a successfully sabotage attack. I pointed this vulnerability out to some "experts" during one of our disaster exercises, but other than being uncomfortable discussing it, nothing ever happened. Sadly typical of our head in the sand approach.
There is a lot of other vital infrastructure out there that would benefit from a bit of hardening.