Quite hard when airlines share multiple gates at multiple airports that none of them own. I guess that's why they employ their own ground handlers and engineering. If aircraft manufacturers thought it was so dire, you'd think there'd be an electronic monitoring system. If Airbus et al can build in cameras so the pilots can see where the wheels are, and the punters can see a nice view ahead from the tail, perhaps they can put ones so the pilots can see if the various pins and covers have been removed. Or carry them all on the flight deck. If they aren't in the rack, don't push back.