I noticed that yesterday when I first saw that chart posted on another thread.
For instance, tiny, rural Alpine County on the California/Nevada border (just south of Lake Tahoe) is shown in blue as having a high gun violence problem. There are only 1,175 people in the entire county which is very rural. I can recall only one instance of a crime committed there when someone traveling through the area committed some crime four or five years ago.
Just a few years ago the Los Angeles Times did a story on Alpine County calling it the safest, most crime free county in all of California.
I was thinking you would know; should have pinged you.