Yup. I got onto it recently with someone in the library parking lot who saw my then 22 month old on a leash and made a negative comment. I was already not feeling well and in a bad mood since said toddler had tried to run in front of a car while we were walking in so I kind of let them have it. The basic jist was I was ill, with 30% of my lung function, physically incapable of running and recovering from surgery and likely to remain quite ill for the foreseeable future (including the very real possibility of requiring a double lung transplant)so if keeping the girl on a leash meant that we could have small outings during the summer instead of being stuck inside on beautiful low humidity days then I was going to do what I needed to do and really I didn't need to deal with their snarky, judgmental comments.
Making the other person cry was not my intent but hopefully next time they will keep their comments to themselves.