it should be easy to get the worst of the lot by simply viewing the chat logs at the beginning of the single table tourneys. They make the rounds hitting every table shortly after it has begun play, to assure they get exposure to all ten people.
You won’t have to check all the tourneys, just check on table for like every hour on the hour. that’s 24, or just check the prime time hours. that should cut it to 12 logs you’d only have to dig into a short ways, and trust me you’ll find the majority of your spammers.