I have been living in the 98409 area code for 2.5 years now and have only had a package "stolen"off of my porch as a crime. I suspect the mail man had more to do with it than local hooligans but that was a couple years ago and nothing since.
Since this is an old thread, did you move to this zip code and if so how has your experience been?
What you should look at within any zipcode is the individual neighborhood you are moving to. Look for a neighborhood where people keep their homes and yards in good condition and have friendly neighbors who look after one another. Also, look at more than the numbers and reports on the schools your children would be attending as they can be deceiving. I suggest you visit the school and meet with an administrator. Also, if you see any parents ask them about the school.
I hope this helps.