From a commenter, describing why 80% of the folding knives would be banned, over on Dave Kopel’s post on the proposed switchblade regulations:
Most modern folding knives have a finger thing that goes up.
A humourous reference to Carolyn McCarthy, speaking about the “shoulder thing that goes up” that she wanted to ban on guns.
Sadly, people just as knowledgeable about knives as McCarthy was knowledgeable about guns are making these new rule-changes…