Product design question

Design a Facebook feature to find roommates.

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What this question tests

Tests product design for a trust-sensitive matching product within an existing social graph.

Target young adults and students seeking roommates, likely leveraging Facebook's existing Marketplace or Groups infrastructure rather than a new standalone product.
Identify the pain point: current roommate search happens informally in Groups with no structured filtering and no trust signal beyond a profile photo.
Design a structured roommate-matching module within Marketplace, with filters for budget, move-in date and lifestyle preferences, plus trust signals like mutual friends and verification.
Prioritize trust signals since living with a stranger is a higher-trust decision than a typical Marketplace transaction.
Define success as successful match rate confirmed by both parties, listing-to-message conversion, and a low safety-report rate.

Leverages Facebook's unique advantage, real-identity social graph and mutual friends, as the core trust mechanism.
Explicitly treats trust and safety as higher priority than for typical buy-and-sell listings given the stakes of shared living.
Names concrete filters, budget and lifestyle preferences, rather than a generic listing format.

Designing a generic listing and filter product without leveraging Facebook's real-identity or mutual-friend trust advantage.
Underweighting safety given the high-stakes nature of choosing a roommate.

How would you handle safety verification without creating excessive friction?
How would you prevent this from being misused for housing discrimination based on visible profile info?