OK, thanks for the clarification. However, on one hand this sounds like a lot of (de)activations I've to do. On the other hand I'll ultimately judge it once it's widely implemented. Most of the time Apple does a good job on such things and remains unobtrusive. We'll see.
I don't know. To me iBeacon only sounds like getting flooded with messages whenever I'm walking through the city, mall, etc. - basically wherever I am. That's definitely not an attractive prospect. At least not for me.