I know, one can uninstall or blacklist a particular app or service so that it doesn't show up on the top menu bar, but is there a way you can voluntarily, and safely (without any Terminal bashing or changing the system (read uninstall)) remove an icon?
For example, I don't need Ubuntu One now, or the Mail icon. There are different ways of doing that, like uninstalling Empathy and Thunderbird, but I need those apps once a while.
So my question is: How do I simply, peacefully, remove a certain icon from the menu bar without uninstalling or blacklisting any app or service?