Let's drop things down and say there is only ~500 deaths due to accidental discharge of a firearm per year in the US. That seems reason enough to discourage gun ownership.
Probably ladders as well...
You've reminded me: The CPSC introduced stop-sale regulation on magnets (remember Buckyballs?) for even fewer deaths than that, and where most of the non-fatal injuries were the result of poor decisions by adolescents. Worse, in my opinion, the relatively small number of deaths that occurred were almost all traceable to irresponsible adults leaving magnets in places where toddlers could pick them up and swallow them.
That's still a sore point for me.
Mandating they all be panted in iridescent reflective coatings would discourage ownership, but not actual use.
PS: Ladders are covered in safety warnings (which may be ridiculous). Guns, not so much.
*=http://www.cdc.gov/HomeandRecreationalSafety/Water-Safety/wa... There are closer to 3,500 accidental drownings per year.
Note, discourage != prohibit. Regular PSA's about the dangers of pool ownership higher taxes, and or required fencing could all save lives.