How harm starts on one platform and continues through WhatsApp, Telegram, Instagram or crypto wallets - often invisible to any single platform's safety team and rarely investigated end-to-end.

Most modern online harm is multi-platform by design. Perpetrators move you through a chain - adult platform to encrypted messenger to crypto wallet to social-media leverage - so that no single platform sees enough to act. Mapping the whole chain is the only way to disrupt it.
Observable patterns that trigger investigation under this area.
Each criterion is publicly defined and applied consistently across every platform we review.
Standardised sharing of confirmed-bad accounts / wallets between platforms.
Working channel with Meta, Telegram, Signal trust teams.
So a complaint on one platform is intelligible on the next.
Mutual legal-assistance routes that actually move at incident speed.
In-product warnings against being moved to encrypted channels.
Sequential, low-risk actions you can take right now.
List every platform where contact happened, with handles and timestamps.
Each platform should know the others were involved.
Lock accounts the perpetrator can see; rotate identifiers if needed.
Remove avatar / username overlap across platforms; rotate emails / phone numbers.
Submit confidentially - encrypted at rest, named reviewers only, you can submit anonymously.