Who did you e-mail? I would like to send them an e-mail asking why they allowed a woman to run the half or full in January (I'll have to look to confirm which one), and also there was a jogging stroller in the Minnie 5k this year.
IMO if they are going to ban strollers, shouldn't they enforce it?

I can't imagine having a stroller on a marathon course. I think someone could easily get hurt.
Just my opinion.