not sure but i also HATE when i get added to stupid group messages. My wife and her sisters along with the mother in law used to include me in their goofy texts. stupid text alerts , one right after another every time each one responds. I finally got them to stop including me in them. I texted the group and told them to erase the group text and start a new one without me included or i would start sending massive amounts of porn pics and videos to all of them all through the night and day. LOL , it worked !