Putting aside the obviously questionable ethics, this seems like a very poor use of a person's time...spending all this time mucking around with ticket changes, all just to get into a lounge.
Yeah, lounges are nice (I used to frequent the Emirates business class lounge in Dubai), but modern airports are more than comfortable for a <6hr layover.
My family spent 8+ hours in Atlanta airport, after getting up at 3AM in Kansas. We found an empty terminal with no scheduled flights for a few hours and had a decent nap.