In my opinion, the ghost hunters should should engage in spirit rescue. When you guys go to Lily Dale, I am sure there are several there that would be willing to instruct you on the techniques used.
Mostly, the encounters that you have are because those souls are not aware that they are dead. Spirit rescue's purpose is to let those souls know they are dead and encourage them to go to the light so that they may move on.
In my opinion, anything less is exploitation of the dead.