Sadly that can be gamed too. The fake account can give 2-4 star reviews to randomly selected apps in an attempt to not have it's targeted review devalued. But

Sadly that can be gamed too. The fake account can give 2-4 star reviews to randomly selected apps in an attempt to not have it's targeted review devalued. But it would be useful for normal accounts. Some people are just super-critical of everything. A 1 star review from such a person shouldn't count for as much. Same thing on the other side with people who only give 5-star reviews.