I don't think departed human souls speak through Ouija boards very often, if at all. If a departed human wants to communicate with you they'll generally appear to you somehow; they'll manifest themselves (whether by appearing to your mind as they did in physical life, by an object connected to them or very often by a scent you'll associate with them and most often by appearing in a dream) so as to let it be known to you exactly who they are. Physical distance as we percieve it has absolutely no meaning to the disincorporated spirit, so it wouldn't be odd to meet a ghost from half a world away.
Originally Posted by Grim Jim
I think your analogy of the "moths to a flame" is probably correct; I think when you open the Ouija session and thereby express desire for an encounter you indeed put up a signal for the entities to respond to.
I would destroy the Ouija, to be certain. As long as it's around, any entity that has attached itself to it has entry to your home and life. After burning the board, get a white sage and juniper smudging stick and light it in each room of the house as you demand the entities to depart. The particular incantation you use doesn't matter, it's purely the intent.
Just my two cents!
"The power of accurate observation is commonly called cynicism by those who have not got it."