Until there is a background check for someone that steals someone else's gun, then I'll go along with that, but until then, I don't see what that will do. The majority of gun violence is committed by those who obtain firearms illegally. The person that bought the gun may have gone through the background check, but the person who stole it did not.
Also, I read once that something like less than 2% of people who lie on the background check form are even investigated. So maybe we could start enforcing the laws we have on the books and investigate people committing fraud to pass the background check.
And I'm wondering about how this came to be #1. Could it be that this being a very divisive subject, gun control, that maybe out of that list of 29, this is the only one they all could agree on? I'd like to know more about the methodology on how they came up with the list of options and how they were presented. If I were to administer a survey and the other 28 options include things like, melt down all guns, free handguns for everyone over 12 years of age, 1 year of military training for all gun owners, A tax of $1,000 per fire arm, public hangings of all gun owners, all adults must carry a fire arm on their hip when out in public, I could make just about anything remotely reasonable as the #1 option.