I never made any mom fold up her stroller! Once in a while I would mention it or ask that they go as far back as possible with it but I never made an issue about it. And I always felt guilty if the mom started messing with it.These poor moms are trying to survive on our crappy bus system as it is, I had no intention of making their lives more miserable.
The idea that the stroller is going to go flying through the windshield would require a moron behind the wheel of the bus. I never had one incident with a baby stroller going anywhere while the bus was in operation.