I don't like how the author keeps making MC a retard that says REAL NAMES to a stream of thoudsands of people.
But even without that, keeping all hidden is stupid as he FUCKING leaked his bitch classmate name already, sure, unless their classmate and herself say she is that bitch the rest of the country will not connect them, but when that is unlikely for the whore their classmates are another thing.
But it was extremely poor writing when the sister wanted her whole fucking name and surname and he gave it, could have just said the name, and the sister is a coward that fears people so there was nothing she could do with it anyway, and MC is tech ignorant in specific moments for the stupid plot as he did notice the stream was still on in the first chapter.