Let the man stay. Life is far too boring as it is with all the namby pamby political correctness that exists in the world. At least with Naza you know what you are getting, he wears his heart on his sleeve (if he has one), is prepared to speak his mind (if he has one) and isnt backwards at coming forwards.
Good, constructive debate needs a number of opinions to thrive and we certainly get them from the Naz man.
In the spirit of the current international refereeing directive, perhaps a a quiet word with the offending player to remind him of the offside rule and that he should enter the ruck properly would be the way to go rather than a yellow or straight red!