An outbreak of tuberculosis or some other deadly disease would be bad enough. Imagine how much worse it will be in major cities with multiple hospital closures! I believe this will BE the actual "terrorist attack" even more so than another plane flying into a building or whatnot. It would have just as devastating an effect, and unlike a plane, there's no possible way to trace it back to the perpetrator...and even if you do, that person will long be dead as well, so oh well.
No matter, though - swampy will be here in the morning to do more copy-and-paste about what racists everyone is for even THINKING such thoughts (even though he "doesn't call other FReepers racist" as you well know). Anyone who thinks their gated communities will save them from the perils of a deadly communicabledisease conveniently forgets that there's no escape from AIRBORNE diseases. Even harder when your gardener and babysitter and maid are the ones bringing it to your town.
Hypocrite :)