Add definitions when reporting a player.
Just a random thought.
It might be beneficial to add definitions or examples to the different categories a person can be reported on. I'm generalizing other research here but it might help reduce the amount of false or inaccurate reports.
For example, many people define "intentional feeding" differently. I define it as someone purposefully dying to give an advantage to the other team (e.g., walking into the tower on purpose). Others seem to define it as having a really bad game in which your K/D is skewed towards the Death side of the ratio. One I think is what the report is meant for. The other, when reported, seems to be the result of a player frustrated that their team lost.
Another example might be "Assisting the Enemy Team" (I believe that's the wording). What behaviors, in game, does this encompass? I just think there is a lack of clarity on some of the behaviors and some players use the report function more to vent than to accurately report players.