The stink bug you may have been seeing is called the Brown Marmorated Stink Bug. The stink bug, which is native to Japan, Korea and China, is more destructive than the native green-colored stink bugs that typically show up in fall. OSU Extension Educator Mark Mechling says the bug isn't harmful to humans, but to Ohio's agriculture industry.
"It's potentially a very destructive insect to the fruit and vegetable industry here in the Midwest," said Mechling. "It's really caused a lot of problems in the east where they initially came into the United States. So we're concerned about it's economic destructive natures to our fruit and vegetable industry."
As it cools down, stink bugs are trying to find a place to hibernate, that's why you might be seeing so many near your house. Mechling says to make sure you close your windows and caulk any cracks to prevent them from getting inside. You should also fix any torn window screens and remove your window air-conditioners.
"Unless you're seeing really large numbers that are congregating together, it's pretty difficult to spray for this insect. So at this point we're just encouraging people just try to deal with them on an individual basis. If you're seeing literally hundreds or thousands at one point, then perhaps you could use an over the counter insecticide that would be labeled for stink bugs."
Stepping on them is not a good idea, as they will let off a bad odor. Instead sweep or vacuum them up.