Dedinging was a Scientology related procedure. According to one source for some time it was mandatory for Scientologists in one are to get themselves dedinged, then there was a power struggle involving the Scientology leadership and those who approved of dedinging lost the struggle. So a whole lot of ordinary Scientologists who had not tried to rebel got caught in the cross fire. They had to travel to some other area and listen to any amount of verbal abuse, paying for the privilege.
None of this is too important, it just shows how things can go wrong, even for people who are trying to get it right in Scientology.