During an online forum for his college geography class, Sunil types a message questioning the intelligence of his classmate Eric and asking the professor to avoid calling on him. The netiquette rule Sunil is breaking is

Sunil’s message insults Eric and could embarrass or hurt him. Netiquette calls for treating other people considerately, including in online discussions. So the rule he is breaking is “being considerate of others.”

AI-written and checked against the verified answer.