There's a reason for that. However you edit the letters to get round the filter, it still 'counts'. Its not acceptable and you will get infractions. Try to use your imagination and find something else to call him*
*or me, or whoever it is you are abusing at the given time.
No such person. Nobody else is going to be mental enough to put in half the hours he does, for zero personal gain, and have the patience, not to mention the technical skills required.