Going back six years or so when I started playing, "Blind Firing" was described as only presenting the weapon. Most typically around a door or over a wall. Rules against this make sense, it's both potentially dangerous and unfair. However the last few sites I've visited, have stated it's when you fire without looking down your sights (e.g. hip firing). This doesn't make sense to me, I mean you wouldn't shoulder a mini gun. One player was chastised for rotating his gun on his shoulder while he angled around a corner, even though in this scenario they were both shouldering it and looking down the iron sights.
What say you? Has something changed or is my interpretation incorrect? Obviously site rules vary from place to place, which have you experienced and which do you think it should be?