I can tell you OP such fines or laws do not exist. Even big chain stores like Wal-mart do not have the power to impose what is basically a by-law upon it's customers. The only way such a law could exist is if it was made a by-law in your district or county which I yet again doubt. Plus enforcement of such a fine would be close to impossible given that there would need to be a clear definition of what constitutes a waste of time. For example, say you are a new customer coming into a supermarket & you're looking for a carton of milk. You ask a member of staff where the dairy section of the store is but it turns out if you had of looked 2 metres to the right of the shop assistant you would of seen the dairy section. Now to a shop assistant who has been working all day dealing with customers this seems like a total waste of time but to you the customer who is only setting foot in the store for the very first time it is a simple enquiry. So where would the distinction be drawn? In a consumer driven market a definition based on that of a potential over worked under paid shop assistant isn't going to hold a lot of water.

Aside from the legal stuff though OP did you know if you say "gullible" really fast it begins to sound like "oranges"