Originally posted by 10fttall
How did you come to find out this is the real reason? BTW, large reliable delivery vehicles are already out there, under the name of automobiles. This holds especially true for large 4X4's. Light years of progress in guidance, and a rocket still could not get anywhere near as reliable a delivery vehicle as a good truck/suv/Hummer that unexpectedly runs a gate or barricade.
People strapped with bombs are pretty reliable delivery vehicles that can get very accurate. Planes, trains and automobiles driven by people are also. What's your point? ATFE regulates this stuff that's why they are concerned about it and want to further regulate it. They specifically address "why large rockets?" in the document. It has to do with the same reason the military uses such devices instead of cars and people strapped with explosives.
Did you read the document? Here's the excerpt.
Quote from the before mentioned ATFE document:
Department Response
The Department has considered the comments regarding the threat
posed by sport rocket motors. For the following reasons, motors with
more than 62.5 grams of propellant present very real security and
public safety risks. Rocket motors containing large amounts of APCP can
power rockets more than 30,000 feet into the air, frequently requiring
high-power rocketry hobbyists to obtain waivers from the Federal
Aviation Administration prior to a launch. These large rocket motors
could also be used to power rockets carrying explosive or noxious
warheads miles downrange into a fixed target. Commenters state that
sport rockets are unguided, not easy to set up, and have a limited
range. These are, in fact, some of the reasons ATF has maintained an
exemption for small sport rockets with 62.5 grams or less of
propellant. However, rockets using more than 62.5 grams of propellant
are capable of stable flight over a fairly long range (one mile or
greater). A willing, determined criminal or terrorist could assemble a
weapon that utilizes a large rocket motor and launch such a device at a
populated area, stadium, or transportation center in a matter of
minutes from a distance sufficient to avoid detection. In addition,
commercially available software can calculate launch parameters to fire
a rocket horizontally or at an angled
trajectory. Rockets can be utilized to hit fixed targets, such as
buildings, or be shot into populated areas with a reasonable degree of
accuracy. Likewise, a rocket being used as a weapon could be launched
from the bed of a truck, thereby making the launch site and any
evidence of the launch mobile. The longer the range of the rocket, the
greater the likelihood that the persons using them for criminal
purposes would succeed in their attack and evade detection and
apprehension. Finally, APCP could be used as an explosive filler in a
pipe bomb or other improvised explosive device. For purposes of
homeland security and the global fight against terrorism, all of these
factors must be taken into account.