What is the potential harm of spyware?

Answer 1

Mainly, identity theft and cyber-robbery. It can collect your bank info, social security number, passwords, and other private information, as well as your name, address, phone number, and other less private information.

Spy-ware in general can result in computer hacking (less common) account hacking (very common - Usually money is stolen, or item are bought in your name and charged to you, but they receive the items) or even blackmail, depending on what is collected.