I dont see how you can be addicted, I eat a Mcdonalds and then I dont want another, I dont feel like having one later, infact usually I dont want another for a long time
When I went to the US we had McDonalds maybe 7 times in the fortnight and on about the 5th time within one bite I felt so sick and stomach pains. Think maybe thats why I dont eat much of McD's much now.
Best ever is Taco Bell in the states