I can't consider this particularly low class because there are almost always circumstances for picking things out of your food. At least in my case. I happen to be allergic to a few things. And you can tell a restaurant that you are allergic but there are places who disregard it, and will put the shrimp in the salad even after you specifically say......I am allergic. Either that, or they could serve something that you just absolutely detest. I think if you have no intention of eating it, you shouldn't force yourself just to appear "classy." Its better than saying "I'm going to eat this even though I may vomit afterwards."