A lot of the time I think these old black and white ghost photos are a lot scarier than modern ones. It doesn't matter how "good" the photo looks - and today there's a lot you can do with photoshop and other computerized stuff - these old ones makes me feel more uneasy...Some of the photos above have obviously been staged, but a few look more "authentic" - or whatever you should call it. Like the one where you can see a child, or a woman, in the window...
I have never met a ghost myself, but I've heard stories from other family members who say they have. Everything in this world is built up of energy. If someone dies - especially if it's a violent death - then maybe some of the energy the dying person releases at the moment of death gets stuck here in this world...Who knows?...