Data on the specific types of crime in the area is not available. A quick web search shows that Ramona is right around the national average.
That being said, I have a policy, I would never show someone a home I wouldn't live in myself. I have several friends in Ramona and have sold many homes there. Every city has its less desirable areas for whatever reasons. Click the link in the web reference below for a list of homes for sale in the nicer areas of Ramona.