Shouldn’t the seller have told you about the ghost in your new house?

Do you really believe in ghosts? Is this a deal breaker? Is the house that you purchased and are now moving into really haunted with ghosts and spirits? Because I am sure most people do not want to be celebrating Halloween every day. http://www.theprovince.com/buying-homes/shouldn+seller+have+told+about+ghost+your+house/12111993/story.html