Such a claim entails substantiating proof. Please post some links to support your statement.
The board itself does nothing. If one was hidden in your house without your knowledge, your domicile would not suddenly become haunted. A person’s belief in the board’s claimed abilities opens them to the possibility of influence by malevolent forces.
Anytime that the users of these are first shown a Ouija board then blindfolded and have the board switched without their knowledge for a board with the letters numbers and Yes/No positions changed before they actually use the board they can NEVER make it give a legible reading. NEVER. This experiment has been done many times.
Why can the “Spiritualist” EVER get the pleschette to move by itself on camera?
Why this type board and not another shape?
As to the temperature of the room and other effects the explanation probably has to do with a state of self hypnosis or expectations. If there is not a documented photo of a thermometer changing temperature in a room where the environmental controls are beyond the ability of the Spiritualist or their henchmen to control then it is not proven
PLEASE NOTE: I am not saying these things are innocent. I am not saying practicing occult activities is not a dangerous hobby - just that the Ouija board is - as even many people in the occult will tell you - a vehicle that is used primarily by con-men