I have been personally threatened in real life by a couple of Christians. I was not in their church disrupting their service either. I was having a conversation with them and others at a party of a mutual friends. Luckily there were other people there and they made them leave.
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It's never come to actual death threats, but there have been some that get all red in the face after they ask and I tell them I don't believe. Usually they ask if that means I'm an atheist, like they want to hear me say it, so I do, and any time it got heated was because of them not me. You can see the mask slip and you know that the "good christian" would like nothing more than to see you struck down right then. All that "I'm praying for you because that's what my god wants" is pure BS.