I cannot agree
I cannot agree that the names of participants in a meeting at any political level be kept secret. The basic notion of all European governments at this time is democracy, and the definition of democracy if government of the people by the people. Keeping names secret is a mockery of the very notion of democracy. The people have the right who is making the decisions for them.
On the other hand, I can only applaud the idea that personal data be kept secret unless authorized by the person. I would even go so far as to say that authorizations should be kept on a case-per-case basis - in other words, I want a new authorization request for ever attempt to resell the data.
My life is private, I have the right to keep it that way.