I didn't watch the interview, and don't plan to. But it sounds like the comments section was heavily moderated, and that Evans himself spent hours beforehand making sure things were sanitized. The callers were screened and one made it through before getting cut off, but Evans had to address the interruption anyway.
To me, that's a success. Anyone intrigued enough to want to know more about Evans will also want to know what that was all about, and it shouldn't take long to figure out that he's not the innocent victim of a harassment campaign, but an awful person. It also serves as a reminder to him that this isn't going to go away.