A firearm is designed to launch a projectile in a known, controlled direction.
Claiming that guns are "designed to kill who it is used on" is inflammatory and disingenuous rhetoric.
While you're possibly technically correct (the best kind of correct!) I think you're the one being a bit disingenuous here.
Plenty of people-- including myself-- use their firearms only for clay/target shooting and never harm a living thing with them. Unless you would be ok restricting gun ownership to single-shot, bolt action competition grade pistols and rifles, though, that's not what is being discussed here.
My guns were designed to kill game and the occasional rampaging tweaker. That's fine with me. I'm not ashamed of being able to put food on my table if I choose to, or defend myself if it becomes necessary.
One interesting theory I've heard is that people who might've been long-term serial killers in the past become mass shooters now - they know that if they don't do all their serial killing in one quick streak, they'll be caught and stopped.
The only article I found supporting this unlikely theory after a *very* cursory search was this one, written by a Salon politics writer whose argument is basically "Elephants are disappearing but tigers are becoming more abundant, so could tigers really be elephants?"
Which means invading their privacy.
Not necessarily. For instance, an anonymous client could state "I am interested in seeing ads for these things," rather than an advertising company stating "We're pretty sure this is John Doe, SSN 123-45-6789, who is 34, drives a Honda, has red hair and calls his mom once a week. Prell Shampoo seems suitable."
An optimist believes we live in the best world possible; a pessimist fears this is true.