Nah not really. I've disclosed my alt account which I use to access the forum via insecure connections/devices, but I don't expect users to do the same. In some instances this would defeat the object of having a alt account. For example, if you run a account which offers a service to people, and are trying to look professional you might not want your comments on politics, and unpopular opinions on certain subjects to be associated with the account that's offering the service. If you run a charity accepting Bitcoin you might not want to have it known that you quite enjoy spending your money on porn site invites, and tokens for camgirl sites.

Although, the majority of people don't need alt accounts there are certainly legitimate reasons to have one.