So, I'm not a very experienced drafter, but I know you're supposed to return the lands you take from the land station. Recently though I attended a WOE draft (faeries, 1-2-0) and accidentally walked off with the 16 lands I borrowed. I know monetarily that's only a few cents, money that the store probably made back that night just off sales from the bulk box, but in terms of etiquette, just how bad is it?

Especially welcome comments from people who have worked in game stores.