Anytime you don't use Duolingo, they send you notification emails. This last one I got sounded threatening. Using phrases like " I'm going to make you do your lessons" and " no one wants to see Duolingo upset" Lastly." a happy duo, means a safe and happy you." That sounds psycho to me. I also checked the details of the sender and it was sent to another email besides mine. I'm assuming another parent. Which is not right due to privacy reasons. Now I'm sure that parent can see my email as well.