John Ashcroft with some of the crank/prank stuff that was done after 9/11 has classified any act like this as an act of terrorism. The person committing this act of terrorism would be treated as a terrorist.
Besides going to jail if caught, this person should lose everything they own to repay the city and companies for the money this cost them. Then that clymer should have to work 24/7 for about 20 years with no pay to repay the $'s he/she/it caused.