The Network: Multi location retail store chain
The Expectation: Customers can be provided guest WiFi; it encourages longer stays in-store and drives purchases
The Catch: Customer connects to guest WiFi and opens a connection to DropBox. Is he snooping on credit card transactions in the store?
The Find: Expect connections to questionable sites from computers with unknown hygeine.
The Lesson: If you are providing guest WiFi services, make sure that section of the network is isolated from your assets.