What is an anti-stealth trap in bot detection and why does it matter?

Anti-stealth traps are checks designed to catch automated browsers that try to patch or hide their automation flags from basic detection tools. BotRefund includes these as part of its 106 independent checks, targeting mismatches that appear when automation tools try to modify browser APIs but break under cross-checking. These traps help catch sophisticated bots that mimic human scrolling and clicking, which basic single-signal tools often miss.