Context matters more than raw detection
A single contact hint may be harmless, but repeated off-platform redirection early in the funnel can indicate policy evasion or risky seller behavior.
Flagging should support review, not automatic panic
The right system captures evidence, creates a staff-visible queue, and preserves the conversation context instead of blindly blocking normal interaction.
Use outcomes to refine thresholds
If a pattern repeatedly leads to disputes, spam, or unsafe experiences, it deserves stronger review rules. If not, the signal may need to be softened.