How secure is a hotspot I borrowed from the library?

As an open, unsecured wireless network, “Hotspots” are freely and easily accessible and are unsecure. The Service Provider, Mesa Community College and their officials and employees are not responsible for, and cannot be held responsible for any files, data, confidential or personal information accessed, transmitted, lost or damaged as a result of using the hotspot. The hotspot has no filtering and the borrower is responsible for monitoring what minors may access or view while using the hotspot.