I've asked a classmate about Android security recently and he complained about downloading a fake Yahoo mail app by accident. He only realized this after friend

I've asked a classmate about Android security recently and he complained about downloading a fake Yahoo mail app by accident. He only realized this after friends asked him what was up with the spam. Just an anecdote, but I found it interesting that it was about the same freemail service as the OP. I haven't been able to Google a written report of it up though.