Yeah, inputing "secure credentials" traceable directly to you with what you'd hope is a bogus password is a very bad idea, especially if you're doing highly secure work.
These aren't local credentials, these are credentials from various third-party websites that made their way into stealer logs. Garbled or not, using your personal email address for both legitimate purposes (e.g. Google Calendar, as the article points out) and honeypots isn't the best idea.