“I wonder if it would bother you if someone felt you were less frum because you weren’t wearing a hat and jacket (not saying you should or shouldn’t- that’s for another thread) I think people see people in hats in jackets in sweltering weather, and maybe think in the back of their minds “Oh, so you think you are better than me because you are wearing a hat and jacket at the zoo in 9o degrees.”
Of course it would bother me if someone wearing a hat and jacket felt I was not as frum as they because I do not dress that way. I doubt that most other people would be as judgmental. It would bother me, because people in that mindset tend to think my kashrus is less than their own, my religious observance is questionable, and my kids are not frum enough. I have experienced that firsthand when someone more rightwing expressed shock that I knew a certain halacha and could discuss it at length, because, “YOU went to a Yeshivah???” I was wearing a long dark skirt, simple dark long-sleeved shirt and had on a snood. I could not have looked more obviously frum. The judgment was made because I mentioned a certain TV show (some medical drama), so I was already “nisht kosher.”
The second part of your paragraph is correct to an extent. I am sure there are those who feel that way. But it does not mitigate then fact that a person who is dressed like that in sweltering heat is a hatzalah call waiting to happen. That is their prerogative, but it does make me feel very uncomfortable physically to see this.