You bet it is. I am a single dad of a 5 yo girl. Try that on for size. When we walked out of the mens room women would act outraged that she had been in there, the fellas where none to happy when I would call female on deck. I even had quite the discussion with mall security once on being a single parent. Evidently if a female takes a little boy into the bathroom its no big deal, if a guy does it he must have alterior motive.
She looks likes Shirley Temple so I have already mounted the shotgun above the front door.
Single Dad here, too. My daughter is 9 1/2. I deal with the stuff you mentioned all too often. I try to be civil but at times I'm just not in the mood, and folks have gotten an earful.
Wanna get some dirty looks? Go to the store and buy a package of little girl's underwear. Alone.