Within Destiny you can report players. At first I thought this was for only negative feedback but after using it to report someone for a negative thing I found out that you can report people for positive behavior as well.
I searched around and was unable to find whether any amount of reporting (good or bad) actually has an affect on the players you're reporting. If anyone knows what the implications of the reporting system is I would welcome the information.
I am playing Destiny on the PS4.