I have a feeling there is tremendous potential for misuse here. People could falsely report terrible activity in a home in order to increase the perceived value in a neighbouring property that may be competing with another. I hope these guys are stocked with a good set of lawyers.
The above is my concern as well.
Grow-op or methlab have to be disclosed on the property disclosure form. Murder or death inside the home is not required to be disclosed in BC.
I think it is always smart to google the address of a property you are considering buying to see if anything interesting comes, or perhaps talk to the neighbours to see if you dig up anything interesting.