Detection and measurement
Honeypot
A hidden form field or link that a human never sees and never interacts with.
Any interaction with a honeypot is strong evidence of automation, so it feeds ground truth rather than the live score. A human never sees the field, so a human never fills it; a form-filling bot that touches every input trips it. Keeping it out of the live score means the rare browser extension that auto-fills hidden fields does not get a real visitor flagged, while the event is still recorded as a labelled example for tuning.
See this signal on your own traffic
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