I have no problems with Trust as a song, it's just a weird opener. When you're a band like Megadeth with so many awesome fast songs it would make more sense to open with a fast song and maybe play a slower song or two around the middle of the set.
May 4th - Volbeat, Anthrax
June 14th - Crowbar, Battlecross
June 24th - Goatwhore (?)
Dec 10th - Motley Crue, Alice Cooper