Wall Street Journal: When Does Technology Cross Ethics?

Can the use of new technology be unethical? Or does such use never cross the ‘bright line’ of ethics?
A piece in the Wall Street Journal raises those questions:
“Police in Washington D.C. arrested a man they believe is responsible for a string of assaults, the Washington Post reported this week. The breakthrough in the case came when investigators placed a tracking device on the car of a convicted rapist. There wasn’t much evidence linking the man to the assaults beyond his past and the fact that he lived in the area. But thanks to the GPS device, the police caught the man committing an assault.
Here’s the catch: The police didn’t have court approval to place the device. And, according to the Post, this is an increasingly common tactic.”
Read the entire story here.