For most of us, it is not practical to eat only optimal foods. I often find myself eating food prepared by someone else in an unknown manner or eating MOUO (Meat Of Unknown Origin), and sometimes I don't have access to my favorite "good" foods.
This may happen when I'm at someone's house for dinner, not able to find a graceful way to turn down a meal that is served to me. Or I may be traveling, and my metabolic needs for calories and stabilized blood sugar may (reasonably I think) trump other considerations.
When this happens, I believe that it's important for us not to judge ourselves (or to judge others!). Orthorexia-induced anxiety may cause more harm than a mediocre meal here and there. For those of us whose lives frequently take us out of the home, eating perfectly may be an unrealistic goal.
What I aim for is to know my food goals very specifically; to make informed, conscious decisions about when and how to diverge from these goals if the situation calls for it; and not to "give up" completely even in difficult circumstances. I read ingredients whenever possible, I ask questions when it might make a difference, and I don't fret too much.
What is your experience with this?