Never upload, paste, or link the actual content. Reporting the username or identity key is enough — moderators act on the reported identity, not on a copy you provide.
If a child is in immediate danger, contact local law enforcement now. In the U.S., child sexual abuse material can also be reported to the NCMEC CyberTipline at report.cybertip.org. CSAM and illegal-content reports here are escalated immediately and are never rate-limited.
Your browser builds a small report, stamps it with a brief proof-of-work (anti-spam), and signs it with a throwaway key generated on the spot — no login, no account, nothing stored about you. It's sent to the moderation queue, which alerts human moderators.
After review, human moderators act through Ping's own clients and servers — the reported @username or profile photo stops being shown across Ping's surfaces. Note that on-chain data is public and permanent — off-chain moderation hides it within Ping going forward, but it can't unpublish what's already on the chain, or copies others (or other clients) may have saved. The more distinct people report the same identity, the higher it's prioritized.