Hi Ian,
Personally I wouldn't live in Warnbro at all, Port kennedy has some bad parts as well as good...the golf course side of Port Kennedy is the nicer part but I have to say I'm not sure if I would live there either. Secret Harbour is nice, I wouldn't say I would never live there again, but I do like Singleton.
As for crime I think there is more as you get closer to Rockingham, nothing too serious that I've heard of.
Schools ???!!! I don't know what the schools are like in Warnbro I'm affraid but because I'm not keen on the areas I wouldn't choose to send mine there.
Lynne