I agree, and it is actually against the rules to put multiple x's for things.
One x will do!
EDIT: It's not an official rule but this is written in a sticky on the RV board.
Also, as the use of numbers (weights, calories, measurements of wounds etc) are not allowed to be posted, we understand that it is easier to star out (*) or put X in the place the number would be. However, a common trend is now to put multiple *s or Xs therefore still indicating the numbers which is can be just as triggering. While this has yet to be updated in the rules, these are still not permitted and will be removed. Please just use one * or X in the place of numbers.