Moderation in all things. Food is one of them.
Except sex. No such thing as too much of that.
I avoid fast food as much as possible,my job requires packing a lunch. However we also work long hours and often have a considerable drive so sometimes road food is essential. Never eat at rotten ronnies though. Will do Wendys or Subway if possible. Sometimes gas station food is all that is available. At home we never eat any crap, almost zero wheat or yeast and as much organic as we can get.