Wrong. Anonymity is a form of privacy, and it's often one of the things that people who become famous miss the most.
The simple fact that it can be stripped from some (who are famous) and retained by others (who are not famous) even when they are both in the exact same public space means that some people (i.e. the non-famous) have a reasonable expectation of anonymity in public - which is to say, a certain form of privacy - where the famous do not.
And that's not the only fault with the "you have no reasonable privacy in public" line of thought when it comes from people who say that technological advances have, in effect, made us all famous. The assertion is valid only if reasonable expectations are limited by what is and is not technically possible, which is not the case. In truth, we need a sense of privacy to function as free humans. You can't have a working democracy without it. To the extent that it's reasonable to expect whatever level of privacy a functioning government of the people, by the people, and for the people requires, you maintain a reasonable expectation even when advancing technology renders you vulnerable.
Ultimately, the thing that keeps people from kicking in our doors isn't the thickness of our doors, but the strength of the laws that restrain those who would do the kicking.
To date, we've been able to rely on technical hurdles to protect our absolutely essential sense of privacy. If technological advance means those days are behind us, then we need the law to do what previously it didn't have to deal with doing. That transition still needs to happen. But at no point in the course of this transition does the reasonable expectation itself go away. Indeed, it becomes even stronger no that it can no longer be taken for granted.
The simple fact that it can be stripped from some (who are famous) and retained by others (who are not famous) even when they are both in the exact same public space means that some people (i.e. the non-famous) have a reasonable expectation of anonymity in public - which is to say, a certain form of privacy - where the famous do not.
And that's not the only fault with the "you have no reasonable privacy in public" line of thought when it comes from people who say that technological advances have, in effect, made us all famous. The assertion is valid only if reasonable expectations are limited by what is and is not technically possible, which is not the case. In truth, we need a sense of privacy to function as free humans. You can't have a working democracy without it. To the extent that it's reasonable to expect whatever level of privacy a functioning government of the people, by the people, and for the people requires, you maintain a reasonable expectation even when advancing technology renders you vulnerable.
Ultimately, the thing that keeps people from kicking in our doors isn't the thickness of our doors, but the strength of the laws that restrain those who would do the kicking.
To date, we've been able to rely on technical hurdles to protect our absolutely essential sense of privacy. If technological advance means those days are behind us, then we need the law to do what previously it didn't have to deal with doing. That transition still needs to happen. But at no point in the course of this transition does the reasonable expectation itself go away. Indeed, it becomes even stronger no that it can no longer be taken for granted.