Building Environment Control software has been one of the ripest fruits out there, and everyday I don't hear of a widespread attack/malware on them I'm surprised.

Wanna know how to kill the nation's power grids?

1 A hacker could gain access to the building environment controls for a city, turn on everything he could to maximum.

2 Electrical demand would increase faster than power companies would be able to generate more power to compensate.

3 brownouts lead to equipment failures, leading to blackouts

4 blackouts last longer than they should because the amount of equipment to be replaced is greater than A) number of spares the utilities have on hand and B) greater than the number of spares that manufacturers can produce in a short timeframe.

No one has realized how easy it would be to hack into building software. No one has realized the widespread damage that could be caused.