I'd go with ignore too, Choco. (Softly's response is great - wish I'd thought of that one)!
My daughter was born with an enormous strawberry mark on her upper arm, taking up a lot of her arm and spreading to her chest. It was extremely large, very, very red and bulbous. Everyone who saw it gave an audible gasp. My FiL said once "Oh, it turns my stomach". I could have throttled him! He never said it again once I'd finished with him!! (Not very subtley, I'm afraid)
Received all sorts of comments (including from a Health Visitor at the baby clinic, in front of all the other Mums) ranging from Ooh that's hideous, has she burned her arm, what's happened there, etc etc, to simply just staring in horror.
I was never bothered about it and never tried to hide it when she was young, but other people made me feel bad, and they gave daughter a complex. Until recent years (she's now 21) she wouldn't even go swimming without wearing a t-shirt, or would go to great pains to wrap a towel around herself to hide it, no matter what her Dad or I did or said to make her feel better and confident about it. I also used to tell her it was an angel kiss 
Now she's fine with it, it's faded considerably, but still visible. Her confidence has finally arrived with age and she's not bothered. Took a while, though. Unfortunately, as usual, it's other people that cause the problem.
It was, however, a great indicator if ever she was sickening for something. It would be red hot and usually predicted a high temperature some time before she was actually ill! Great warning sign 
I had a strawberry mark on my cheek, it was gone by the time I was five years old.
Stork marks generally fade quite quickly, I believe. Until then, just ignore the ignorant comments. Some people do make comments out of genuine concern and inquisitiveness, some people can just be complete thoughtless idiots. You will have to get used to them all and grow a thick skin.