It still happens near Reno, NV area but it is just a few head of cattle they take, and as Tony Pro has said it is just mainly tweekers, drunks, high schoolers, or college fraternity pleadges that does that.

"I have this Nightmare. I'm on 5th avenue watching the St. Patrick's Day parade and I have a coronary and nine thousand cops march happily over my body." Chief Sidney Green