Have I found more people on Streetp then listed at Mii Plaza? Nintendo 3DS?

I've owned a 3DS since launch day and so far ony found one person on streetp (or so it says!). I was playing around with the Mii Studio and I found out that you could press left on the D-pad and X and Y to bring up a blocked users list which you can manage. When I opened this up, there were three people I was able to block, one the person I'd met in streetp, and the other two I've never seen before. I checked all my Miis but none matched, I have no friends on my Friends List and I haven't played online with anybody