Because Magnolia is on it's own little penninsula with only two bridges into the community, it is a little isolated from the rest of Seattle, and has almost no drive through traffice. This isolation and lack of drive through traffic I think helps to make the community safer than most.
Reading the Magnolia News every week I would always notice that a car would get broken into in the Discovery Park parking lot. You'd think cops would have stationed themselves over there, but I guess they didn't because at least one break in happened almost every week there. But that's on the North side.
Just like every neighborhood, there will be good parts and not so good parts. You can tell by the houses and the cars parked in front of them. "Location location location!!!"