I was thinking more about the "close range" stuff since the OP's post mentioned kidnapping, which suggests "up close and personal" confrontation. But you have a point: if somebody just wants you dead, at any cost, it's hard to protect against a sniper, at least if they know your whereabouts.

If you want to get really paranoid, you can imagine a vector where somebody attacks by, say, intercepting your pizza delivery and adding poison to it or something. :-(