Has anyone else had them around too? They're all over the side of my house, on the telephone poles and street signs I see . Other than that, they're shells are all over the sidewalks and roads and the dead ones are lying around everywhere. I also had the experience of watching some come out of its shell.. . They're not harmful... They just look like giant wasps .
There's a video about that on an extremely popular video-posting site by scishow that I find may interest you.