I can see the circumstances where, for one reason or another, your appointment gets cancelled while you are in the lounge - at which stage you cancel the ticket, leave the Lounge and try to leave the airport (although how you would actually do that is open to question).

But the cost of getting to the airport just to have some free food and wine would surely outweigh the cost of having the equivalent free food and wine in town.

So, not only is it theft, it's also stupid.