As disgusting as these reality shows are, I don’t think this is a reality show problem any more than George Reeves’ death was a superhero show problem.
Bad security happens.
Maury Povich, Jenny Jones, Oprah, et al are also “reality tv” (maybe not Jerry Springer).
There’s been a murder of a guest from at least one of these programs because a man was invited to appear on national television under some guise and then a man on the program came out to him to profess his gay love for this dude while the audience laughed and hollered.
But from what I know of this case (very little) the murdered ex-wife didn’t have anything to do with the program and his reason for murder had nothing to do with the program either. But the producers may still have liked him as a character since he seemed “a bit off”.