It does make you grind your teeth a little, but then again its their problem and like Liz said they possibly have baggage about the whole BF issue...good on you tho for feeling comfortable enough to BF in public, i walked out of the dr's office today with little miss on the boob into a full waiting room and unfortunately a couple of women looked at little put out by it but hey at least DD wasn't screaming the surgery down.
IMO i think the more we are able to be comfortable with public BF the less people while get so offended by it as there as been such a large generational gap between BF being seen as "normal" thanks to the marketing of large formula companies (and FF people out there please dont take that the wrong way i have to comp feed and have no problem with people that FF)