Ah, alas... I'm not alone. ^^
But now I'm curious, too. Just because I understand the rating to be on purpose visible when looking at the "people"-tabs (you can see the activity in the places-tabs, too), doesn't mean it was meant to be seen.
So maybe someone from the SCN team can give the ultimative answer in this while I'll go and polish my new badge. ^^
Regards,
Steffi.