Region B release licence - how does it work?

[Hintermann]

Originally Posted by MichaelB

It's pretty much inconceivable that a third-party release of a major studio title like Rollerball would be allowed to be region-free. The label wouldn't have any choice in the matter. A single-territory third-party distributor would certainly be ordered to region-lock their releases even if the rightsholder's own ones are region-free.

OK. Forgive if this is a silly question but I am not very techy and so am only asking. Is it possible for a BD release to be apparently region locked but their being the facility of an unadvertised hidden menu feature within the disc which can be used to make it temporarily region free - you know something like the hidden "Easter Eggs" on some DVDs? Such information can then be circulated through the "usual channels" such as these forums.