Well isn't that nice? You could take the high road and ignore them, or...
- stare back until they feel embarassed
- ask them if they would like to take a picture of you so they can keep staring all day long
- pull out a badge that says "I have cancer" and watch them squirm! (you'll probably have to make it yourself, so you may as well have a laugh and make it big and colourful)
- say "I have cancer, what's your excuse?"
- be honest: tell people you might look different but that doesn't mean you should be treated differently
- if young children take a curious interest in your appearance, take the opportunity to educate them about cancer and how to treat people living with cancer
- if you're with someone, say loudly to them "I've got an audience member"
- wave and say "yes that was me, and no, there's no plans for a sequel"