So, now, on a more sober note:

I can imagine MLE battering one of their own to make her look authentic but - well, it's a lot of trouble to go to to catch one alleged muggleborn-friendly shopkeep. In which case, I suppose perhaps Dora's right and this really is a sign that we're becoming a trusted resource for the district.

Still, probably best to keep an eye out for Ministry-types sniffing about.