The test scraper that IP-banned our entire office

Was testing a scraping script on staging and completely forgot to add exponential backoff on retries. It hit a minor rate-limit error, got stuck in an infinite retry loop, and hammered the target server with thousands of requests per second.
By the time I noticed, the target platform had hard-banned our entire office IP.
The whole engineering team lost access to an external tool we rely on, and I had to spend the afternoon begging IT to cycle our router to get a new public IP.