It seems to be fairly common for people to pretend to have allergies when they just don't like something. Which just means that those who do have allergies get taken less seriously. My DP is allergic to walnuts. Luckily not life threatening, but he does come out within minutes of eating walnuts in a painful rash. A number of times he will order something that has other nuts in it, check there are no walnuts in it, and come out in a painful rash. When talking to the server, they always say - oh there were hardly any walnuts in it, so I thought you wouldn't be able to taste them. Aaarrgghh.