Sea-Lioning is an Internet slang term referring to intrusive attempts at engaging an unwilling debate opponent by feigning civility and incessantly requesting evidence to back up their claims. The term was coined in September 2014 by anti-GamerGate Internet users to mock perceived online discussion tactics employed by GamerGate supporters.
https://amp.knowyourmeme.com/memes/sea-lioning
Dang, that comic will be ten years old next week.