Here's what Dr. Atkins has to say about going back to induction from maintainance (or going off the diet for a period of time) repeatedly:

From page 216 DANDR:

"If you keep retreating to induction from lifetime maintainance, it becomes a form of yo-yo dieting. I'm not saying you should not go back to induction when you need it, I'm simply saying don't do it regularly, in the belief that it will always work the same way for you. You may be in for a nasty surprise"

and that nasty surprise is:

From page 159 DANDR:

"When people learn that they can lose weight quickly as they do during induction, they sometimes take their ability to lose weight for granted. They don't think in terms of a lifetime commitment to the Atkins lifestyle--just a quick fix for overindulgence. The result of this faulty thinking is yo-yo dieting and metabolic resistance to weight loss ."

The more times you lose weight only to regain it, the harder it becomes each time to lose the weight again. Your body "remembers" the last time you dieted and responds by lowering your metabolism much more quickly each time you re-start. The only thing that will overcome that metabolic resistance is time and patience, along with not starving your body so that it learns to trust that you won't starve it again and be willing to let go of those fat stores.