Another caterpillar in the yard

This one was well-hidden deep among my bunch of purple carrots...It didn't seem to have done much damage as far as I can tell from the foliage of the carrots. The colors were quite different from the previous ones on the tomato plant, with iridescent yellow spots on a striped neon and black background. I wonder what it will turn into?

Another colorful caterpillar

Caterpillar - Garden boon or bane?

This caterpillar and a few others of its kind are voraciously feeding on my tomato plant... which poses a sticky dilemma for the owner of the garden - should I exterminate the buggers and let my tomatoes grow in peace or leave them to mature to become beautiful butterflies at the expense of the fruits of my labor?