Some interesting things you can and cannot bring on planes in the US

From here (Word doc).

• Toy Transformer robots are permitted on the plane.
  
• Umbrellas are permitted after inspection.
• Safety razors are permitted.
• Ice picks, meat cleavers, and swords are not permitted as carry-ons.
• Nor are spear guns, cricket bats, or bows and arrows.
• Flare guns may not even be packed as checked luggage, nor may gun powder.
  
• You may check "realistic replicas of firearms", though you may not bring it on the plane with you.
• Axes and hatchets, drills and drill bits, and cattle prods are not permitted on the plane.
  
• "Tools" smaller than seven inches in length are allowed as carryons. So, pliers, I suppose.
• Throwing stars are, disappointingly, not permitted in the cabin, thereby ruining my dream of an airline that employs ninjas as flight attendants.
• You are not allowed to check "realistic replicas of explosives". Why? Beats me.
• At first glance you're not allowed to carryon or check anything flammable: matches, lighters, lighter fluid, gasoline, paint thinner, gas torches.
  
• Lighters without fuel may be checked.
• Lighters with fuel may not be checked, unless in a DOT approved container.
• Strike anywhere matches may not be carried aboard nor checked.
• Saftey matches may be carried on, up to 4 books of them, but may not be checked.

• You may not bring your own fire extinguisher, nor check it.
• Tear gas is prohibited both in the cargo hold and the cabin.
• Rounded and/or plastic butter knives are permitted as carryons.

I sort of want to fill up a box with dull metal butter knives know and try to get it onto a plane with me. It would be fun.