Because the division line is shifted, the term "party" means something entirely different. So, yes, in one party state there are still groups within it, with different beliefs about things, and they work toward consensus using voting. Street protests are just one of the forms of democracy (and they are often organised by party).
As for privacy in the western sense - does this include USA, with no personal data protection at all?
There certainly are street protests, usually in response to local incidents, but the whole transmission mechanism is extremely limited to the bare minimum. And certainly not capable of discussing privacy in any Western sense.