Now me, I don't mind getting sent Anthrax, a little annoying prehaps but ultimatly I don't mind.
Sending me say Ebola in a box would "upset" me, in fact i'd be extremly annoyed.
But Anthrax, nah no problems.
Here's the funny part.
I work in a department that on average recieves about 4 very large packages a day, mostly from unknown sources, it's part of the thing with software, you just put it in any box you can find.
As a result of the above I am intenstly amused.