The simple solution? DON'T SIT THERE! 90% of those seats are season ticket holders who WANT the change to snag balls.

As for your assumption about human response time, it's incorrect. See FoulBallz.com. I've written about the fallacy of assumping there's not enough time to respond. 

The fact is, parents are responsible for every single child injury. They know--should know--where it's most dangerous and simply use common sense and NOT sit there. I sit with my kids in the OF and/or Upper Decks because I use common sense, and I want to protect my kids. 

Additionally, that lame claim that MLB somehow owes fans more safety is a crock. They have ticket, PR & signage warning about dangers. Fans need to learn responsibility, something I push on FoulBallz.com. 

74% of fan foul ball facials, as of July 10, 2017, are a DIRECT result of fans being too drunk, being on their phone or some other absurd reason. 74%. PLUS 1500 are on their phones at any given time. Take responsibilty.