Discription of Events: Clearly offensive liscense plate. They drive uses KXK because KKK would not pass, and the 88 in 8800 is a Neo-Nazi number.
This is taken directly from the wikipedia entry of 88:
"Neo-Nazis use the number 88 as an abbreviation for the Nazi salute Heil Hitler.[8] The letter H is eighth in the alphabet, whereby 88 becomes HH.[9]"