Why is the 'kink' account different? For me, I too have my 'kink' account. But, I have friends I have become very close to, both in my local community and from here, that I communicate with using that account. I may ask advice, or respond to their requests for same, I may discuss something that is going on in my relationship, in order to get feedback...and I don't want to share that process with Him. And, I think it's wrong that a Dominant would expect me to be a completely open book. For example, I attend a monthly submissive's meeting. Does He know that I go? Yes. Do we sometimes talk about the general topics in each month's meeting? Yes. But, He and I both consider that to be "mine", and I get to choose how much to tell Him about that meeting and what is said. I must consider the privacy expectations of the other attendees, as well as my own need for privacy.
I simply don't agree with the sharing of email passwords under any circumstances. That's just my opinion, of course.