Society is disgustingly pussified, but it's still on a case by case basis.
The cops here have been pretty cool about airsoft for the most part.
When my house was robbed back in '05 I had my collection including a loaded G36 and Mac11 laying around in my room. When the cops came to do a search-around, they stumbled upon them and there was no issue. They weren't even touched.
Case by case, though rarely in our favour I guess.