The answer to 'stink bug scratching sounds' is that the scratching noises are likely caused by stink bugs moving around and feeding on plants or other surfaces in your home. Stink bugs have piercing-sucking mouthparts that they use to puncture and feed on a variety of plants, which can produce a scratching or scraping sound as they move.
Stink bugs are not dangerous to humans, but their presence can be a nuisance. If you're hearing frequent scratching or scraping sounds, it's a good idea to inspect your home for signs of stink bug activity, such as the bugs themselves or any damage to plants or other surfaces. You can try to control stink bugs through DIY methods like vacuuming them up or using insecticidal sprays, but for severe infestations, it's best to call in a professional pest control technician who can properly identify and eliminate the problem.