'Policing' is a wrong conceptualization. It implies use of force and exercise of authority. In the context of Hive, the term is almost always used as way to spin and complain by people who don't like how others vote: If you like it, it is responsible downvoting, if you don't like it, it is harmful 'policing'.

Voting is not and never will be policing.

Vote up and down based on your subjective opinion of value to Hive and make the value of your Hive go up. For small payouts on comments and such, it hardly matters. Rewarding engagement helps Hive. But when large and repeated payouts drain a lot of rewards and don't do much to help Hive, that is a problem. Be part of the solution.