So, you want them to ignore a possible substance and allow passengers to walk right in to another attack?
Why spend all the money for more security if you want them to ignore possible problems. I want them to spot problems and check them out for my safety when flying. Otherwise, I am the next innocent passenger that will be killed when something they chose to ignore was in fact a substance that could have been investigated. Hm....guess there would be a number of lawsuits there. Great for the lawyers.
I want them to use their heads.
Closing down the entire airport EVERY time some white powder is found is more than a bit extreme.
By doing so, every airport in the country could be shutdown a couple times a week by
a handful of guys walking around with a pocket full of creamer and a open/closeable hole.