Question: what can i do with someone's public ip?
Answer: Restrict Your Access to Certain Services. ...  Spam You With “Personalized” Ads. ...  Add It to a Database and Sell It on the Dark Web. ...  Find Limited Personal Info About You. ...  DoS/DDoS Your Network. ...  Sue You for Copyright Infringement. ...  Prevent You from Playing Online Games. ...  Use a VPN Service.