Typical Union Thuggery

In case you haven't heard or read, several supermarket unions throughout Southern California have gone on strike (technically, they've been "locked out"). As is pretty typical of unions when they picket, two members have been arrested for allegedly beating a replacement worker with basball bat.

What is it with these thugs, and why is it that unions are even necessary anymore with all the legal protections that employees have against "exploitation"? I'm telling you, the only people who benefit from unions these days are the elitest/communistic mafiosos who run them, and not the common rank and file members or those employees who are forced to pay non-member "fair-share" fees.