The internet would be a MUCH MUCH more safer place if someone wrote a trojan to simply blow up the computer, thereby killing whoever was stupid enough to get said trojan.
Might take a few days, or even weeks, but pretty soon, all the stupid people would be dead, and the internet would be better off because of it.
edit: yes yes, I am well aware this is not possible.. but one can dream.
I'll remember this next time, when at work, someone calls in "my internetz is not working", after going down the list of every possible technical cause that I can check for, the issues seemed to be the fact that the modem was not powered, nor connected to the pc. (And it was a wired modem, didn't have wireless)