ahem...
No matter how many conservative talk shows have him as a guest, sing his praises, or say 'what a great guy,' I remember his strong anti-gun comments during a live news broadcast here in California. Remember the man in Stevenson Ranch/Santa Clarita in the middle of the day? He had guns, and he'd made up stories to his neighbors that he was a federal agent. AFAIK, that was it. Then the FBI and LA county sheriffs descended on him, and he shot at them, and they torched his house, and he died. I'd have to research the case again but either way, there was ol' John Walsh, flapping his gums about "nut cases who like guns," "we have to get these guns off the streets!" etc.
"I figured out how to catch fugitives without a gun." --- John Walsh, father of Adam Walsh, a 6 year old child who was abducted and murdered by a pedophile. John Walsh founded a national center for missing and exploited children in the US. The center has apprehended 600 criminals in a few years.
See also L. Neil Smith's essay in which he declares "John Walsh is a plague all by himself." What Ever Happened to TV?
He's also for "ballistic fingerprinting" for all new firearms.