Honestly the crime rate at Dodger Stadium is probably lower per capita than throughout LA.
However, this incident, while not sports related, is sports fan related, and is LA sports fan related, and really, is basically LA related. Translation: probably a higher proportion of idiots in LA than in other cities like SF and Sacramento. But we knew that already.
That said, I've seen my share of, not violence, but shenanigans at A's games when I was a kid, 25 years ago. Once, in the bleacher area, I saw a verrrry drunk guy FALL from about a 30 foot ledge, smacking hard onto the cement ground next to me in a crowd. May have died. Don't know, I skidaddled. (the adults helped of course)
I was also at an A's game with my father when I got my first whiff of marijuana, which I realized in retrospect maybe 7 years later. Apparently Pops knew what it was like a bloodhound and immediately told the party people to "get that crap outta here."
Also, stadiums are where I think most youngsters get their first taste of the wrong side of the law... who hasn't felt the rush of being with a parent trying to buy tickets off a scalper? I have, but somehow that was always more fun with my ex-WWII fighter pilot Texas-born Grandfather, than with my Mom in a station wagon, 4 kids in tow!
Good times.