I've had some strange personal experiences. My buddies and I lived in an apartment that we swore was haunted. Pots and pans would bang in the middle of the night. Woke up one night and the lights in the place were on when I was there alone.
I've had other experiences the day that my cousin died. My mom saw my Dad after he passed.
Could there be a logical explanation for these things that happened? Sure. Can I prove it either way? Nope.
I wouldn't rule out the existence of ghosts though. If ghosts are real, it's just a matter of time before our technology advances to the point where we can prove it. If they aren't real, then we can keep telling ghost stories and entertaining everyone for decades to come.