That's horrible! And completely unnecessary... Unless you're located on top of a hibernaculum or have a lot of venomous snakes around, snakes are the best and safest pest control out there! We're in a really agricultural area, and even people who HATE snakes refuse to kill rat and corn snakes for that reason.

It ticks me off that they're selling it as 'humane' too, because there are probably a lot of people who know nothing about snakes and think that leaving the container in a field somewhere and pouring vegetable oil on it doesn't harm the snake.

Way to go writing them a letter!