Comment 4 for bug 270411

If I changed my bazaar username as suggested, then that would involve giving my e-mail address away to spammers. It's true that Launchpad might not display the email address itself, but any bot viewing the bzr log through the web interface would learn my e-mail address. And since I have to log in to get write access anyway, Launchpad obviously knows my identity without having to parse my e-mail address from the log.

Additionally, I didn't find any documentation about this behavior.