deb and bill
"There are enough openings in your home that will leak whatever you are trying to keep out even if you do tape up the windows and doors. "
what they are trying to keep out are chemical and biological agents. though these may seep in through some of the *small* openings you have mentioned the amount will most likely not be enough to be fatal. according to the dhs, chemicals used in chemical warfare dissipate fairly quickly in open air. if you have your windows or large holes exposed, a lethal dose may come in and kill you. if you hunker down until the cloud dissipates (usually < 5 hours), even if you get sick from a small amount, you will probably not die or be seriously injured.
"Did you ever think someone who sells visqueen or 6 mil plastic and duct tape might have been the one to start that idea? What a great way to make a bundle of money."
no they did not. the government and agencies like the red cross have been promoting this, and not just recently.
"What makes anyone think three days will be enough? What if it is really four or seven or a month? What about if you are at work or in the car when it happens? Oops, I'm in WDW - I need to bring my plastic along to tape up my windows on my balcony. "
no need to be so sarcastic here. the fact is for the type of attack this is meant to protect against, 3 days will be more than enough. obviously, plastic and duct tape won't help if there is a bomb. it is meant to protect against LOCALIZED chemical or biological attack. if you don't want to do it fine, but don't mock the people who choose to follow the government's advice.
"Plan for real emergencies, not fantasies."
where i live and work, this is a real possibility. it is not a fantasy. i don't care how other people prepare, but you don't need to put people down just b/c you don't agree with them.