Could a Cessna 150 contain several hundred pounds of C-4? Yes.
Could a Cessna 150 contain a dirty bomb? Yes.
Could a Cessna 150 contain biological agents? Yes.
Could a Cessna 150 contain chemical agents? Yes.
Luke, my friend, you are as wrong as can be that a small aircraft is no threat.
You forgot the suitcase nuke. It could carry one of those, too.
Beckwith, my friend, your argument proves too much. Today, yes today, you or anyone else can drive any vehicle within 100 yards of the White House and disperse much more c-4, a heavier dirty bomb, much more biological agents, and much more chemical agents than can a measly little Cessna 150. No one is going to ask you to identify yourself on the radio and no one is going to check the contents of your vehicle.
The pilots made a dumb mistake. NORAD realized that it was probably just that. The F-16 pilots didn't overreact. The point of the article and my commentary is that the entire bureaucracy, news media, and the manipulable, gullible folks swayed by the official PARANOIA who see danger in every little airplane need to wise up. We may be at war with terrorists, but unless there are other indicia of a genuine threat, there is no need to by paranoid. Cautious yes, paranoid no.