Many have went off without having the trigger pulled, but only after some nitwit with a bent screwdriver and a broken claw hammer adjusted screws he should have never touched.
Amen!
I remember one of the posters on this thread (I won't say who because it is not necessary) lecturing on a different thread 2 years ago about the supposed deficiencies of the Weatherby Mark V, with pictures to prove his point, and
confusing the trigger sear with the bolt retainer plunger. No wonder a Weatherby (or a Remington) could fire unintentionally if such gunsmithing expertise is applied to it - which apparently it was, with predictable result: "the gun fired by itself" - even though the Mark V actually has an uttermost reliable bolt-mounted, firing pin-blocking safety independent of the trigger...
Anyway...
The same issue can happen with any brand and any system. For example, if the praised Win 70 "3 position" safety is not installed correctly so that it cams the firing pin cocking piece 1/64 of an inch backward when engaged, hence disengaging the sear, then it too can fail. This is a grand classic with people upgrading their rifle (military Mauser, CZ, Zastava, Browning, Remington, etc.) with a Lapour, Gentry, AHR, etc. after market safety themselves without understanding how it works, and without adjusting the contact surfaces...
The sad part is that this can even happen at the factory nowadays that pride in one's work is essentially obsolete. I got from the New Haven factory a limited run Win 70 .300 Wby Stainless Classic on which the safety simply could not be engaged. Apparently, and somehow, the rifle had skipped the adjustment step after the parts assembly step...