As he is a pretty loyal Decepticon, I imagine Tarn's opinions of the Autobots are pretty low. Though his focus seems to be on traitors of the Decepticon cause. I've no doubt in my mind he'd kill an Autobot, however. I'm not sure if he'd go out of his way to do it, all things considered, but... Autobots are the Decepticons' enemy, so it's only logical.

[sigh] I know we can't. I'm not suggesting anything, just someone keeping a close eye on Drift and Pharma.