We could not see what they were eating and they all seemed to be the same size, so we feared that there was a little machine that was cloning them. There seemed to be no other explanation.
Then I thought of accessing Google, the universal fount of knowledge.
I googled "stink bugs" and found that most varieties were plant eaters and that's when the penny dropped. My dear wife has filled every corner of our house with wonderfuly healthy plants!
If you have been invaded by these critters, you might look at your houseplants closely. These stinkbugs do not give away their presence like other plant munchers, they only leave tiny pinholes that can be easily missed unless you are looking for them.
So now, you do not have to wait for the stinkbugs to hide in your closets and sock drawers, you can seek them out where they feed and hopefully rid yourself of this years most annoying pest.