|Quoting CXfirst (Reply 8):|
Wasn't there a story a while ago from China, where a man bought a full-fare China Eastern (?) ticket, ate his lunch in the lounge for a year, and when he got towards the limit of ticket changes (one year from original travel date), he cancelled it for a full refund. He didn't receive any fine or the like.
That story was on quite a few news sites, and I would bet this man got the idea from that.