You'll know a stinkbug when you smell it. It's kind of a hybrid stench, somewhere between rotting garbage and old milk. The odor is exuded when the bug is frightened, so don't try to smash it or splat it. If you have something against bugs, perhaps getting an indoor pesticide is what you should do. You can then just vacuum them up. Of course you'll want to empty the vacuum asap so you don't risk trapping the smell.
How to Distinguish a Stink Bug
-Either green or brown in color. These critters are born green and become darker (brown) as they age.
-Adult forms have wings and antennas. Nymphs (babies) don't, though, so don't think it's not a stink bug just because it doesn't have wings.
-Found in or around plants. They tend to stay near the food source.
These buggers reproduce very rapidly. Female stink bugs have the ability to lay over 100 eggs in their short lifespan. Once she leaves her sack of eggs, it only takes day for these eggs to hatch. Because of this, it is vital to get to them quickly. There have been no reports of stink bugs being dangerous to humans (by bite or anything), but they attack the foliage around us effecting our ecosystem and food supply. It appears all they do is reproduce and eat greenery.
To keep them away, let's consider what they are attracted to: light, heat, and greenery. To reduce the things that entice them is to lower the risk of an infestation of stink bugs. Turn off lights and turn down the heat when not needed. Inspecting the plants that you have in y our home will give you a leg up on finding them quickly.
Luckily, they are found most often outdoors. It's only when it is cold outside do they tend to seek our shelters. There are things you can do to keep your home safe from these bugs.
As cracks in walls and windowsills are major entry points, be sure to seal these and any other possibilities. You can build a barrier around the outside of your home by spring something like cypermethrin. Be sure to cover the complete perimeter.
If you find them outside, there are different chemicals you can use. A home-remedy that is recognized is simply shaking them off into a bucket of soapy water. Consider this though... by killing the ones outside, you may be killing what's keeping the caterpillars away.