I suggest you don't waste your time on those who were already kicked out from the community. They are like those beggars which you mostly find in a common society Because every community needs some beggars so they can donate their charity to them.

Prepetuator is one of them, So just chill and focus on your work. He/They doesn't want that you reach your goal and he gets kicked on his a** again.

You have a mute option - may be using it against these types of spammers is better than replying to them because they will keep defending until the admins don't freeze their account but the steemit team has a big heart and they say let them earn pennies so they can buy milk for their kids.