Requiring them to be parked at a stroller park. Right now, cast members go to areas and get strollers and move them to park them. Make it a rule that they are parked with a cast member. If not they are removed from the park. You should have to go and claim them. Same with scooters, if they can't be in the line, they must be parked in the proper place. Limit the time that a stroller can be parked there. Same with a
scooter. There is no real reason to leave a stroller, all morning, in one place. If you want to do that, Disney can have a location, outside of the park.
Have bomb sniffing dogs in the areas where strollers park. I was in the "world" for 6 days and saw one security dog. And that was at Disney Springs.
And that is just for starters.