I mostly agree. However, part of setting up games for tournament play is to check to see if a game has a slam tilt switch and if it does, to make sure it’s at least somewhat looser than the regular tilt (if not completely disabled).
If I’m getting slam tilts before tilt warnings, I’m going think hard about going back to another event where that same person is doing setup. I’ve always completely disabled slam tilts before an event. Bend contacts as far away from each other as possible or electrical tape, done. I suspect in this case it may have been overlooked or they didn’t have keys. If it was me and I didn’t get a warning, I’d accept the DQ, then suggest to the setup person(s) that they should check slam tilts before the event in the future.
Get your normal tilt setting right and you won’t need a slam tilt.