After all - the phenomena we witnessed over the years (and which hasn't happened in over 10 years) was neither predictable nor controllable. Not something that lends itself to testing. I find the various tv shows on hauntings to be really funny, actually. Seems like people are just spooking themselves, more often than not.
Influences on the brain could account for most of the 'sightings' that people have had at the farm over the years, I suppose - it's the physical, and sometimes violent manifestations thats the straw that broke the camel's back so to speak. It's hard to argue with it when inanimate objects move - sometimes quickly, and sometimes destructively right in front of multiple witnesses.
Again - I'm not looking for believers - or to convert people to being believers. Just saying why I believe.