It's a clever (and hilarious) strategy that will probably sell at least a few licenses. As an anime hater I'd be motivated by this.

Just change the pictures in cmd/anubis/static/img/ to whatever you prefer, I think.

Or, alternatively, you know, pay the author for the work they've done

Or, alternatively, just embrace anime-porn content spectrum. I mean, just compare platforms that are free of it and ones that are chock full, and see which ones die and which grows.

Sure, if you're going to deploy it on your company site, but I think if you're running a personal website and want to throttle LLM crawlers without falsely advertising that you're a furry, you could just go and modify this piece of MIT-licensed software.

Or you could pay for BotStopper and have RPM/DEB packages too.

That's kinda what the company Friendly Captcha does