(Note: This is not about YOU specifically.)
If you are identifiably Orthodox and you go out in public, please Please PLEASE behave yourself! Don't be rude, obnoxious, loud...don't cut ahead in line or refuse to pay your bills...don't let your kids run all over the place and make noise...and don't act like the world owes you something for being frum!
Whether you like it or not the entire Jewish nation is being judged by YOUR behavior, so you have a responsibility to be a good ambassador! Especially if you live someplace where they don't see a lot of Orthodox Jews.
So if you can't handle it, then do us all a favor and take off the Yarmulke!
That is all.