My guess is that it has more to do with them being
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I bet they wanted no more part of it once the SEC went after JB for fraud in 2012. Maybe I'm naive in that way, but I don't think first responders with careers protecting the public tend to be the types who would want any part in a scam aimed at the vulnerable types (the poor and uneducated) who end up being penny stock gamblers.
The way they were portrayed by the sleazy IFLUB pumpers made it sound like they were in cahoots with JB, part of the show to fool the public that JB actually had something that needed protection. Any fireman or police officer seeing how they were being used by those seedy con men would have wanted to immediately distance themselves from the unsavory "entities" involved.