There are a lot of IRL companies that keep trade secrets from their shareholders. In fact, securities law prohibits sharing information with shareholders that is not also made available to the general public at the same time. Shareholders are shareholders - they are not managers or even directors. In some countries shareholders that start to act like managers lose their limited liability shield.

I respect tawsix's right to keep the exact rig recipe secret and support his reasons for doing so.  The information he has chosen to share is fine by me (price and hashing speed). I do not support (and neither should Nefario if he wants to legitimise GLBSE) secret information being made shareholder only. If shareholders don't like this they can always sell or just not buy in the first place.