Except that currently, any report fits that criteria. So it would not increase the burden even the slightest.
You must have missed this part:
C.XI.2 Harassment, “griefing,” abusive behavior or chat, conduct intended to unreasonably undermine or disrupt the Game experiences of others, deliberate inactivity or disconnecting, and/or any other activity which violates Blizzard’s Codes of Conduct or In-Game Policies. <
It applies not only to chat, if you take a minute and read it.
Using no reason to kick is no against the rules. Using a reason which is discriminatory or hostile in nature is deemed abusive