As previously reported on the Freedom@Work blog, union militants are certainly making headlines of late using violent tactics and vandalism to prove their point.

Stunningly, union thugs in Michigan may have taken this to the next level last week when John King, owner of King Electrical Services, was reportedly shot by a union goon spraying the word "scab" on the side of his car in the driveway.

Of course this should surprise no one familiar with the violent legacy of Big Labor, including that of AFL-CIO union boss Richard Trumka. But for good measure, the Investor’s Business Daily (IBD) opined today about union bosses’ reliance on violence to get their way:

The attack on King is emblematic of the sad fact that the leading perpetrators of political violence today are U.S. labor unions.

They’ve grown more violent in their rhetoric as their political power grows and their appeal to workers diminishes.

According to the National Institute for Labor Relations Research, a right-to-work think tank in Washington, there have been 4,400 incidents of union violence in the last 20 years.

The Teamsters are the leading perpetrators, with 454 incidents. But IBEW, which some suspect in the King incident, is in the top 10, having engaged in 125 incidents.

All told, there have been 11,600 incidents of union violence against workers, management and the public since 1975.

In 1973, the United States Supreme Court actually ruled to grant union officials the special privilege to be exempt from federal prosecution for union violence. And shocking these numbers may seem, the National Institute for Labor Relations Research states that for reported incidences of union violence between 1975 and 2000, only three percent of those incidents have led to an arrest and conviction.

The numbers used by IBD also don’t account for the fact that most incidents of union violence go unreported (a study of one strike found seven instances of violence for every on reported on in the media) meaning that the already staggering numbers the article cites are just the tip of the iceberg.