Comment by never_inline

> counting the number of letters in a word seems to be a good way to filter out LLMs

As long as this challenge remains obscure enough to be not worth implementing special handlers in the crawler, this sounds a neat idea.

But I think if everyone starts doing this particular challenge (char count), the crawlers will start instructing a cheap LLM to do appropriate tool calls and get around it. So the challenge needs to be obscure.

I wonder if anyone tried building a crawler-firewall or even nginx script which will let the site admin plug their own challenge generator in lua or something, which would then create a minimum HTML form. Maybe even vibe code it :)