In Japan the organized crime called the Yakuza does a lot of punishment through mutilation. Gang members who screw up or enemy gang members have the end joints of their fingers cut off so people in public can recognize right away.
Frankly I never found this scary and it sounds lame compared to america where criminals just shoot and kill people.
Anyway, we could always snip off a few joint on the spammers hands, making it hard/painful to type...