I contemplated the same before. How can I cause maximum panic (not even death!) that would result in economic damages and/or anti-freedom policy changes, for least amount of money/resources/risk of getting caught.

Yet here we are, peaceful and law-abiding citizens, building instead of destroying.

The ultimate truth is, if you don't like "The System", destroying it won't make things better. You need to put effort into building which is really hard!