Malware authors ....
1) drawn and quartered,
2) burned alive,
3) publicly flogged to death,
4) have their fingers and toes hacked off with a machete, then promptly beheaded,
5) used for live bayonet training at a military training base,
6) strapped into an electric chair, whose power source is controlled by a relay, connected to an internet facing computer, with the IP address publicly posted for the world to take note, (the voltage being limited to being non lethal for a non disclosed amount of time, then "all bets off").
Choose one as the preferred method of execution.