It looks like I got my first real StreetPass!! The hit was someone with 1 hits in total (first hit!), but plenty of plaza guests and game progress. Seems like it wasn't NetPass randomly sending me a pass while deactivated this time :p
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Doubly confident it was real as the timestamp was when I was offline!
I VIP people I pass IRL. If you go on a trip I reccomend leaving your 3DS on and walking around the Airport. I got a pass with someone from Russia while waiting to leave from the Prauge airport.