Did you forget the video that was posted here on Gizmodo? By simply constructing wicker baskets around large stones, they were able to roll multi-ton stones with about a dozen people.
I'm a television major, and while my concentration is post-production, I know many people who do this directing for a living. It can be HECTIC and stressful but there's nothing like seeing a flawless coordination of all that shit.
It clearly calls it a "passive RFID device" in the article. I assume you know that stands for Radio Frequency Identification so clearly it's NOT a GPS tag and clearly you can't just pull it up and find the location or they would have just done that 5 years ago when the damn cat went missing.
This type of RFID is the same kind that let's you just wave your card over a sensor to unlock a door or do one of those "quick pay" type of credit cards. It emits a signal that only works within 6 inches or so.
Your logic is flawed, basically is what I'm sayin.