I think I've only ever run into 2 SPs in public. Kept walking for both.
I know I have been seeing SPs too frequently when I accidentally call them by the name of the lady I saw the week before. In my defence I got 3 of the 6 letters in her SP name correct though.
I was recognized once in a busy downtown hotel. He called me by my work name, I handed him the card for the agency I was working for at the time, blew him a kiss and headed to the drivers car.
Actually, it just means that you live or work in a popular part of the city!
Naming names publicly is barely cool, though. Especially when it sounds like none of them saw you, it feels kind of creepish. But it is kind of weird, and it's not like you can plan something like that! I'm sure it felt rather serendipitous to you at the time!