I agree, but (1) disincentivizing people from owning firearms is going to ensure that people who don't care about others will be the only ones who then go on to make/purchase firearms; and (2) the implements themselves are not at issue.

The reason I mentioned automobiles was to add some perspective to the scope of the issue. I honestly don't think it's a problem. That being said, if we want to address it, focusing on the implements is not an effective method for curtailing the end result: mass violence.