In response to International Caps Lock Day last week, Sean Ragan made this caps lock trainer key:

DOES SOMEONE YOU KNOW HAVE A SHOUTING PROBLEM? IF SO THEN THIS HANDY TRAINER KEY MAKES THE PERFECT GIFT. A standard 101-pattern caps lock key has had its lettering removed by wiping with a paper towel soaked in acetone, and has been augmented with two fourteen-gauge 10mm lebret spikes from the body jeweler’s, which are threaded into appropriately sized holes drilled in the key with a pin vise, and then secured with epoxy. You only have to hit it once to be cured of using the caps lock key forever.