Tripcodes changed after moot sold the site, meaning whoever the original qanon was, there's literally no way to verify any posts after the change are the same person (they almost definitely weren't). Also, you can just use trip explorer to "hack" a tripcode, and this was always possible. Identity on 4chan has always been impossible to preserve in a meaningful way on purpose, which is why pretty much every successful 4chan-originated project moved away from the boards to communicate.

Anyway, it's not comparable to an account, and judging someone for using a tool rather than what they're using it for is insane. Social media are tools.