Nope, seeing as it hasnt been proven in any sense of the word, i dont see any reason to believe in it.
Take mediums for example, all they are doing is using a technique called "Cold Reading", so people talking to spirits has been proven to be bullshit.
Ghosts however, hasn't really been disproved yet, though all the tv shows about it sure do come close to proving there's no such thing as ghosts, for example, take one of them, doesnt matter which one, they'r all as lame, when they sit around in an old house with absolutely no light what-so-ever, meaning they are in complete darkness, Then they say they hear things and see things moving, Explaining this is very simple:
When in a very quiet place for extended periods of time, the human hearing becomes more delicate, picking up sounds one would normally not notice, meaning they are able to hear the wind even through walls as well as bugs and stuff inside the walls, making them believe they hear ghosts.
When in a dark place for extended periods of time, 2 things will happen:
1, you're vision will become more keen on seeing even though its dark, making your eyes more sensitive.
2, Human instinct will kick in, the most basic of all our instincts, the survival instinct, that makes the mind portray things that arent real, and make out patterns to resemble danger for 1 reason, to make us get out of there, dark places is the best place for predators to hide, meaning we humans arent very comfortable in complete darkness when we cant see our surroundings, that all dates back to when there were actual dangers out there, like tigers and lions and stuff like that.
So no, i dont believe in ghosts seeing as 99% of it has been disproven through either science or genetics/dna research.