Questions about rules/props should be brought up with the host of the game you intend on attending. They are the only ones that can ok the use of a particular prop for a game. As a general rule of thumb so long as the prop is SAFE and all players are aware of the use/rules of the prop, then it should be ok. Again I just want to point out, if you want to use a prop at a particular event discuss it with the host of said event to make sure it is ok with everyone.
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