This is not a github issue. A git commit object contains your email address. This is a basic feature of git.

If you have an open source project used by more than yourself, please don't make yourself uncontactable. If you've abandoned the project, make it clear that you have and if you're lucky enough to have an active fork, point to that.

It's not an issue, I have been using a separate email for all development purposes. You should always separate your email addresses for different purposes, that including my mobile contacts.

wait until he realizes that unsigned commits can be made to look like they're from anyone...

I feel like someone isn't fully groking the beauty of decentralized / distributed version control systems...