Hey everyone!
To further clarify some things here. Some have asked why Game Masters do not actively look for these profiles. There are several reasons.
Primarily a Game Master’s work is to answer Customer Support tickets. If anyone here has opened a ticket recently you will probably have seen how long the queues currently are. To task Game Masters to entering game and looking for inappropriate behaviour does impact the support queues.
In the hypothetical situation of logging in to search for this behaviour, the Game Master would need to login with the appropriate addon, find offending characters to witness it, and then, because accounts are not actioned from ingame, search for the character and account in the tools they use to work, followed by locating the evidence in logs and documenting this before taking action. Again, this is not an insignificant or quick task per character investigated.
When you compare this to the “Report” tool where, once enough player reports trigger the review, the report received already has character and account information along with all the reported chat logs ready and waiting to verify and action as well as being essentially another ticket in the queue the Game Master is working on.
Finally, all Game Masters can review the logs, if you’ve reported a profile and been told it cannot be investigated then it’s worth opening the ticket again.
Closing the thread here as everything has been covered, please do keep reporting these profiles ingame / via ticket 
Thanks!