Also practically speaking, I think it would materially affect the style of play on modern games if a warning-through also resulted in a DQ. On older games with no warnings, everyone knows a good shove can get you a tilt-through. Moderns usually allow more action, because most of the time if you tilt you’re only affecting yourself, the machine will calm down before the next player. But of course in rare situations you can get a warning to bleed over.
Penalizing both the same way I feel would cause play on moderns to be far too cautious, with less people being able to display their bumping, nudging, or insane outlane-shake or slap-save skills over fear that they might tilt and might induce a warning.