You can use a Oujia/spirit board alone. I rarely work with others when doing so. Using one on a table does not "release their non human force". Spirits are all around us. Using a game board will not open any special gates/doors, nor effect how a spirit can act. It is simply a tool meant to help people speak with spirits.
Regardles of how you ask your question, a spirit can lie.
Burning won't make the board "scream". It is theorized that when you use one you open a door for spirits to come through, and that by burning it there is no way to close said door. But like I said, spirits do not need such things to exist on our plane.
I do agree one should not use one drunk or under the influence of drugs. In general one should not be under the influence when doing any "magic". I also agree with the statement that multiple people speaking could confuse and upset the spirit(s). Heck I get confused and upset when too many talk to me at once lol.
This is just my opinion stemming from years of use of spirit boards with my family. Always double and triple check sources. There is loads of garbage information out there