What you're saying is true, which is why reviews are context-dependent. E.g. this user lives in Germany, so his review has more weight for Germans. This user l

What you're saying is true, which is why reviews are context-dependent. E.g. this user lives in Germany, so his review has more weight for Germans. This user likes Indian food so his review has more weight for people that also like Indian food. Well that would be the ideal. But then you need the ranking process to know something about you, at which point you can't really work with real anonymity. Maybe Google could hide the real names and profiles of people that want to remain anonymous, but use their profile in the ranking they are doing.