this post was submitted on 15 Jan 2026
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LLM-driven web scraping is intense for some sites, so their bot detection software is tuned in a way that creates a lot of false positives.
Obscuring your browser fingerprint, or blocking javascript, or using an unusual user-agent string can trigger a captcha challenge.
If you're not doing that and seeing a site suddenly start giving your captchas then they may be being DDoS'd by scrapers and are challenging all clients.
A site that archives content is especially vulnerable because they have a lot of the data that is useful for AI training.
It is incredibly annoying, but until we have a robust way of proving identity that can't be gamed by bad actors we're stuck with individual user challenges.