🙁 Sorry to hear - people can be real jerks sometimes. Even unsubtle ones! As you said its rude, not to mention pathetic and demeaning. When such incidents happen to me, a quote by William Blake from my high school springs into my brain and it seems quite appropriate
"The minds of the weak are not ready for it, for they shall mock and dance like the ignorant sheep they are"
At the end of the day, these people are getting their amusement from the way someone else looks and thats pathetic in my honest opinion