I try to avoid the temptation, because how could I get a hamburger without french fries? And the french fries are even higher calories! And yet I love McDonald's, even though normal people looking at my every day diet (like my mom!) would think I am some sort of health freak.
The couple of times I did the mall food court thing for lunch, I was going to make up for the calories at dinner, but ended up not being hungry really the rest of the day. Probably because when I looked the meal up on my calorie app, there was twice as much fat just in the burger than I normally eat in the whole day.
If I really want a hamburger and fries I go to a sit-down place near me, where I can cut the burger in half and they put it in a box for me to take home. And the fries are steak-cut which is slightly lower cal than the real fast food.