When Dave Mustaine was unceremoniously kicked out of Metallica in 1983 basically for being an angry drunk, it began a 20-year-long feud. No matter how much he accomplished with his subsequent band Megadeth, Mustaine has never seemed over his ejection from Metallica (the band’s 2004 documentary Some Kind Of Monster shows him crying about it to Lars Ulrich). But Mustaine seems to beef with everyone he meets; former band members, other musicians, even the President of the United States – he recently accused President Obama of staging this summer’s shootings in Colorado and Wisconsin. This hardly seems fair, since unlike Mustaine’s other enemies, Obama is unable to respond with a shredding guitar solo.