I support the idea that there's an inherent conflict of interest for news people (radio, TV, or print) asked to serve on a jury. Radio personalities - even morning personalities? I'm not convinced. They rarely work with prosecutors, police, or court personnel - unless they're defendants, which would likely remove them from the jury pool.
If anything, most morning personalities would represent the more-informed portion of society that reads the paper, listens to the news, and is more aware of their local government. That shouldn't predispose them to any particular biases. The idea that they couldn't help themselves and would discuss the case on the air is absurd. Do you mean to tell me that they're not smarter than that?
As far as this thread being "self-promotion", I guess anything's possible. More likely, it's about an unusual event in the local radio "family".