I'm so tired of bots. A certain bot from Singapore started pulling all of the product images across multiple domains. Ok, whatever... Then we realized it never stopped. It made enough requests to download them 4-5x over and was still going. The AWS bill was not nice.

We added them to our robots.txt, but traffic didn't stop. I complained to their provider, who happened to also be AWS. Oh, the shock - they didn't care and recommended using robots.txt! AWS was making good money on both ends with this bot that apparently had more money to burn than we do.