There is a popup that says "Are you sure you want to delete this post?"
Edit. Not delete. When I said I have deleted someones post, I mean that due to hitting the edit button by mistake (which is right next to reply if your an officer) and I type out my reply, I delete their post because I overwrite it. I tend to not like to quote what people said, as its typically obvious, so I ctrl-a to remove it. I know it sounds like a nub issue, but the "edit someone else's post" is a new feature, perhaps I need glasses =P