First, I agree with what Matt said above and, even IF they were using the trademark "illegally", the parties settled the first lawsuit for an undisclosed amount. Sally's counsel had the responsibility to care for that. Period.
So, in alignment with Matt's explanation, there was nothing immoral about it IMO. I respect John DeLorean for all the positive things he did, but it would be irresponsible to dismiss the decisions he made that caused the DeLorean Motor Company to fail. DMCH was a major part of the brand's survival and resurgence ever since they took risks to buy the parts and build the business in Texas. They were also a big part of me deciding to buy a DeLorean because there was a multi-location parts and service company supporting the car.
In my time in this community, I have found the DMC people to be anything but immoral, from Stephen down to their technicians. They strive every day to provide services to us, the car owners, and many times despite the negativity.
People complain about lack of parts being reproduced, but they don't think about the drag on the business that things like this, or defending the brand against "Ty DeLorean" have.
Again there is no shortage of drama in the community, and for some it carries a hard cost.