Nintendo does send out notices to the 3DS so that's how I knew about them and I figure it may not seem worth reporting since Nintendo will send out a special Mii along with the announcement that most would already know about it. But, I guess not, as you have indicated.
I'm just tired of streetpass zones constantly stopping where I live. First all McDonald's went away after finally getting a good rhythm and regulars I could streetpass with. Then I discover that Best Buy and Future Shops streetpass zones are finally working. It turns out The Home Depot will streetpass as well. Except all Future Shops then shut down leaving just Best Buy and Home Depot.
Now I live in a smaller area with only 1 of each store and I've got to drive 15 - 20 minutes to get to another one. Suddenly in the past 2 months, my local Best Buy has stopped streetpassing. The zone doesn't work anymore. I was hoping this latest Streetpass weekend may get it fixed but it has not. If I want quick streetpasses, all I've got is a Home Depot about 5 minutes away. After that, I have to start spending more time and gas to start travelling to farther and farther locations. There's another Home Depot and Best Buy about 15 -20 minutes away so that can be an hour round trip and there's another Home Depot and Best Buy about 30 - 40 minutes away. I've tried a couple malls but got nothing. The longer the 3DS exists, the more the streetpass function seems to be fading away. I'm never getting that Animal Crossing Streetpass badge.