Well, frankly I don't know Murrieta to comment. BUT, it's for this reason why I thought (and still think) buying in Otay Mesa is an equally bad idea for the same reason.
Whenever something else is "out of place" with the surrounding neighborhood, it just seems like it would have a target painted on it, unless you have a serious police force to do serious patrolling. In the Bay Area, this is particularly effective in dealing with the East PaloAlto and Palo Alto, Mountain View thing. Once upon a time, crime that typically was confined to east palo alto started to increase in surrounding areas like PA, MV, Sunnyvale.. Then the police from those jurisdiction started to band together and started doing some hard core crackdown, the sort of "you mess with our city, we're gonna get you and you'll regret it". It seemed to have worked. While E. Palo Alto might have one the highest crime rates in CA, the rest of the surrounding is pretty safe (or at least I feel it's pretty safe).
The problem with some of these new higher-end "ranches" like Otay Mesa for example, is that they really should have been placed as a city with it's own full size police force. You might not like the copper that writes you a ticket here and there, but if that's all a copper needs to do in a city because he/she is bored, that's a good thing imho.