Personally, I LOVE ouija boards, and I HATE them, I've tried them before and they tottally work, but I am also freaked out that it could bring over some unwanted demons lol
I've also heard that it was all subconcious, or that one or more people can be in it, and move it themselves, and 'prank' their other friends
"Critics warn that "evil demons" pretend to be cooperative ghosts in order to trick players into becoming spiritually possessed."
Even if it is all subconcious, i'd rather not deal with any demons XD
But that is pretty freaky, because it couldn't be your brother spelling it out, it could be subconcious though, there was some tests done in a lab, and they asked some people some questions, and it went to either yes or no on the board, then they blind folded them and without telling them, turned the board 180 degrees, then when they asked them questions, it went to the empty spaces where yes and no used to be
I think i might get a few friends to come over, and record the board with my camera, then try it ourselves while we're blindfolded, that way it couldn't be any of us spelling out the words, and then we can check afterwards to see if it actually spelled stuff out:P