Here's some more background on the logging protest from 1987 that resulted in a SLAPP suit:
A Stand for a Stand
by Kelpie Wilson
One July morning in 1987, I found myself with five new friends at a logging site in Oregon’s Siskiyou National Forest. Valerie Wade, a college student, fifth generation Oregonian, and daughter of a logger, had climbed to the top of a ninety-foot yarder spar pole to hang a banner. Chained to the bottom of the yarder, which drags felled trees up steep slopes to waiting log trucks, were Karen Wood, a Eugene computer scientist; Michele Miller, an elementary school teacher from Chico, California; Kamala Redd, a college student from New York City; James Jackson, a surveyor from Texas, and myself, a new graduate with a B.S. in mechanical engineering from Chico State, about to head off to a career in alternative energy.