James Green was not amused when his 15-year-old daughter Bernice started getting text messages from neighbourhood boys at 10:30 at night.

There they were, popping up on his cellphone.

The Sulphur, La., salesman had installed RADAR on Bernice's cellphone; the software lets parents monitor everything that goes in and out of their teens' phones, including texts and photos.

“It is the most immaculate thing in the world. She knows I can see everything she does, which kind of puts some responsibility in her court,” said the father of four, sheepishly admitting he lied to Bernice, initially telling her the technology was merely a GPS insert.