Originally Posted by
tenant13
What would have happened if I just stayed in Japan for a month? Book this fare on AAvacations including a cheap hotel in BKK for 3-4 nights but get off in Narita and (possibly) go to Thailand much later, chill in Japan for a month and catch a returning flight either from BKK as originally intended or Narita. Would they ban me from flying forever?
Banning wouldn't be your concern--they'd have already canceled your later flights after you no-showed the connecting flight. Your concern would be that you're stuck in BKK or NRT without a return ticket, unless you are able to reinstate the itinerary after paying a high reinstatement fee.