I submit that we have ready to hand an effective counter to the
Weer'd Beard has an extensive listing of non-firearm related killings as well as the arguments and falsehoods deployed by those groups and individuals working to restrict or revoke our personal freedom of choice.
The US .gov helpfully publishes a listing of all firearms crimes that occur in the country, from which can be extracted those that have occurred in "Gun Free Zone" locations.
JayG provides an extensive (several hundred entries now) listing of individual self-defense shootings in his "Dead Goblin Count" labeled postings.
A campaign of 30 to 60 second audio/video segments that verbally recount the actual events of several criminal shootings in gun free zones, with an equal number of news stories about legitimate (ie: legal) self-defense shootings (with online links to all of them displayed on-screen) ought to be one effective counter to efforts to demonize firearms and private ownership of same.
A simultaneous a/v campaign listing the narratives anti-gun groups and individuals promulgate (Weer'd comes through again) with the actual facts won't be quite as effective, but should keep opposition efforts divided between two separate but complimentary counter messages.
If there is some actual money available for this, arrange to have as many of the real people involved read their pro-ownership self-defense story on camera. Should s/he be visually non-threatening in appearance then this would be a plus.
A steady progression of new videos that don't repeat events, but pound home the same pro-rights/personal liberty message, shouldn't cost much money in this day and age (and should YouTube censor them, then there's your 1st Amendment law suit too, Mr. Gottlieb) and could be used to solicit financing to take the same campaign onto the broadcast airwaves as well. Done as a 2 year campaign, the effect on both inhibiting near-term opportunistic political action, as well as the next federal election cycle, should make much of Joe Huffman's present concerns fade in intensity (there's always going to be somebody who sees personal advantage in stealing from you so we will never end these types of efforts entirely).