Assuming that it was impossible to have *any* privacy, you would immediately see widespread persecution of anyone who didn't fit the "norm". Shortly afterward, anyone with any intelligence would cease any public activities which did not meet general approval and start looking for ways to engage in them so that only other people with those hobbies would know about it - in effect, clamoring to restore the lost privacy.
In short, a life without privacy is one where you must live according to how everyone else wants you to live, whether than living how *you* want to live. It is a prison without bars.