Using said proprietary digital property without expressed consent of the owner is an actionable legal offense can lead to harsh civil or criminal penalties. Your IP address is traceable, and police are able to obtain individual MAC addresses of your computer. If you share the proprietary information, monitoring the hash values can lead to evidence against you in a software piracy case. Sometimes the devices used to allegedly commit piracy are confiscated and not returned or may not function properly after forensic examination regardless of the outcome of the case. Sometimes merely implying intent may be enough to obtain the search warrant, depending on the judge. Best Buy Inc and its subsidiaries have the resources to drag out a long and costly legal battle, which might put unbearable and unrecoverable financial strain on some individuals. In summary, tread lightly and return the disk swiftly.