Union activists and big labor supporters who were upset that people were gathering in Vancouver, Wash., to talk about worker freedom resorted to violence and intimidation Thursday night, which resulted in a Mackinac Center for Public Policy employee getting spat upon.

F. Vincent Vernuccio, labor policy director at the Mackinac Center, was invited by The Freedom Foundation in Washington and the Cascade Policy Institute in Oregon to speak about the benefits of worker freedom. However, he didn’t even get out of his car before he was confronted by protesters.

About 30 protesters holding anti-right-to-work and other signs with union logos and slogans greeted cars entering the parking lot of Clark College, he said. Once in the lot, Vernuccio said he rolled down his window to shake hands with someone, but instead was spat upon by a protester holding a union sign.