You're talking about apples an oranges! First of all anyone with a real nut allergy looks out for themselves and will get up and walk away. Same as my family does if someone is smoking next to us or has a dog. My daughter has serious asthma issues. No matter where we are.
Secondly, I am left baffled to why the Op feels so adamantly that their way is the right way and we are all horrible SUV stroller nazi's. Of course I chose my stroller for my comfort!! I have to load it into my van! It has to fit MY two kids safely. I have to push it up curbs and down side walks. SO my stroller works for me. What you have works for you. Great!
If the park is so busy that strollers are knocking in to you or stopping in front of you then perhaps you should try off season.

That's when I go and there is plenty of room for everyone along Main Street and every where else in the Happiest Place on Earth. Good luck to you and your plight against the big strollers in DL.