[Chummy]

"...'A small airplane weighing less than a large SUV and traveling at 120 mph just doesn't pose the same kind of threat — or create as narrow a response window — as a fully loaded airliner traveling at 400 mph,' Boyer explained...."

"Same" kind of threat, no, but a threat nonetheless. I wholeheartedly support aviation, including GA, but public safety and security must be paramount.

The window reopens following the event. A life lost to a nutbag in a light aircraft carrying [ fill in the blank ] is not so fortunate.

[Chemist_Geek]

I wholeheartedly support aviation, including GA, but public safety and security must be paramount.

That's a very dangerous precedent you're allowing to be set.

"I wholeheartedly support (fill in the blank) but public safety and security must be paramount." Hunting? Shooting? Owning one's own vehicle?

[spinestein]

Even the smallest plane weighs several thousand pounds and when flown by a terrorist at a high rate of speed into a dense crowd of civilians will certainly result in the deaths of at least hundreds of people.

This is just from the result of the kinetic energy of a small aircraft plowing through a crowd at 150 mph WITHOUT explosives. If you figure any incendiary device or other dispersal weapons the deaths could be in the thousands.