Is it possible to filter the Results of the FindNearby method dependant on the PlaceCategory?

Other idea according to the post of John:
Is it possible to hide/remove some PlaceCategories from the Map, so they won't appear in the results?

My Problem is that I'm importing some Locations with the ImportData method then I add a Location by lat/long and afterwards I want to search with the FindNearby method inside the imported data and for each hit i add a pushpin with a special symbol. But it seems that inside the results I also get some sights or similar locations, too. So there are too many pushpins.
Also funny on another machine, the "too much pushpins" do not appear even though it's the same code, db, mp ...

I'm using MP 2004 and VB.Net.