We get inundated with these little Firebugs but nowhere near as bad as shield bugs that somehow or another get into sealed rooms and then buzz around you at night when sat in bed reading. Some years the front of our south facing house is covered in ladybirds which also get into the house and cluster in the corner of rooms. They can stink as well but the Firebugs I tend to leave as I do not have the time to eradicate them all. They seem to love clustering on the Hisbiscus seedheads.