Checking the Handle rules is a part of the acceptance process. I'm not sure exactly who does the accepting these days - I'm pretty sure Togan Jano and Ranma do it, and I assume Syn still does as well.
However, new handles for players that recreate after death are not checked.
I don't believe there is any attempt to enforce changes on any handles that don't meet requirements, including those of people who joined before the handle rules came into force.
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"May the Grace of Ara go with you, and His Vengeance be wrought upon your enemies."
Ranma and I do the bulk of join requests, and Dreighton and Togan occasionally help out as well. About 5 other people have access to, also.
However, from the sound of it I assume you want to report an illegal handle - handle changes are rarely forced since many handles pre-date the modern handle rules, and occasionally obscure references slip past.