Violent protests at La Scala Opera House in Milan, Italy Sunday.<br/> <br />They've become a tradition -- happening each year on the venue's opening night.<br/> <br />But this year's round comes hot on the heels of a November strike by public workers and students over labor reforms.<br/> <br />The protests started early in the day, but stretched on into the night.<br/> <br />Meanwhile, opera goers inside paid almost 2500 dollars to watch a production of Beethoven's "Fidelio."<br/> <br />Protesters voiced their discontent with the policies of Prime Minister Matteo Renzi...who has tried to make it easier for large companies to fire workers...enraging labor unions and their supporters.