AI went nuts on my website and generated a $155 excessive bandwidth bill

On January 1, I received a bill from my web hosting provider for a bandwidth overage for $155. I've never had this happen before. For comparison, I pay about $400/year for the hosting service, and usually the limitation is disk space.

Turns out, on December 17, my bandwidth usage jumped dramatically - see the attached graph.

I run a few different sites, but tech support was able to help me narrow it down to one site. This is a hobbyist site, with a small phpBB forum, for a very specific model of motorhome that hasn't been built in 25 years. This is NOT a high traffic site; we might get a new post once a week...when it's busy. I run it on my own dime; there are no ads, no donation links, etc.

Tech support found that AI bots were crawling the site repeatedly. In particular, OpenAI's bot was hitting it extremely hard.

Here's an example: There are about 1,500 attachments to posts (mostly images), totaling about 1.5 GB on the disc. None of these are huge; a few are into the 3-4 megabyte range, probably larger than necessary, but not outrageously large either. The bot pulled 1.5 terabytes on just those pictures. It kept pulling the same pictures repeatedly and only stopped because I locked the site down. This is insane behavior.

I locked down the pictures so you had to be logged in to see them, but the attack continued. This morning I took the site offline to stop the deluge.

My provider recommended implementing Cloudflare, which initially irritated me, until I realized there was a free tier. Cloudflare can block bots, apparently. I'll re-enable the site in a few days after the dust settles.

I contacted OpenAI, arguing with their bot on the site, demanding the bug that caused this be fixed. The bot suggested things like "robots.txt", which I did, but...come on, the bot shouldn't be doing that, and I shouldn't be on the hook to fix their mistake. It's clearly a bug. Eventually the bot gave up talking to me, and an apparent human emailed me with the same info. I replied, trying to tell them that their bot has a bug to cause this. I doubt they care, though.

I also asked for their billing address, so I can send them a bill for the $155 and my consulting fee time. I know it's unlikely I'll ever see a dime. Fortunately my provider said they'd waive the fee as a courtesy, as long as I addressed the issue, but if OpenAI does end up coming through, I'll tell my provider not to waive it. OpenAI is responsible for this and should pay for it.

This incident reinforces all of my beliefs about AI: Use everyone else's resources and take no responsibility for it.