RB, your life B”H must be wonderful if the MOST despicable thing you have heard of is a kosher Subway. Really. If you think hard, I am sure you can find more despicable things to be concerned about than sandwiches.
Now I was going to argue that this is just going too far. First we have separate swimming hours, then we have separate buses from Monsey/Lakewood, and now the SUBWAYS are ALSO going to be separate, so they can be kosher? (yes, I AM kidding).