Timothy,
What they do on stage and screen is public and the public have a right to a sense of ownership, but what they do in private is entirely their own concern.
Agree, 100% - however, by the same token, they should not expect to move to the front of the restaurant queue, celebrity handling whilst out shopping, expect to be let off speeding tickets etc....the list goes on.
It could be said that the price of celebrity is to be open to the public whenever out of their private domicile - which was actually bought for them (indirectly) by the fans that support their work.
Before you scream at me - I don't personally subscribe to that theory, but I sympathise with people who do.