Well there is one thing you can trust facebook to do, that is protect their interests.
We have a site called appcent.re which is pretty basic, and we created a facebook user name facebook.com/appcentre. Amazingly facebook, with their launch of Appcenter, failed to grab the international spelling of appcentre.
So initially, we were getting dozens of likes as people stumbled upon the international spelling of AppCenter.
Of course, without warning or notification, Facebook invoked their terms and conditions clause 4.10
If you select a username or similar identifier for your account or Page, we reserve the right to remove or reclaim it if we believe it is appropriate (such as when a trademark owner complains about a username that does not closely relate to a user’s actual name).
So they did, they reclaimed it for themselves. Now facebook.com/appcentre redirects to facebook.com.
They cant be claiming it for trade mark reasons (as appcenter is a trade marked twice in the US of Borland Software & Oddysey Software) and appcentre isn’t trademarked at all.
So they have invoked their right ‘if they believe it is appropriate’, and corporate profits are obviously appropriate.
So you can trust to Facebook to do the right thing for themselves. They are totally within their T&C’s so I can’t complain.