For some...maybe. SKC for example inflict great social harm on many of their customers but you wouldn't think an airline would do it !
On another level I suppose you're referring to how all airlines are dirty polluters and how so many multinational companies exploit dirt cheap labor in countries like Bangladesh and all sorts of other social and moral arguments but its perhaps worth noting that the average salary at AIR is over $100K per person and they crew get six weeks annual leave and most I have talked too see AIR as a very responsible employer with a very good culture. I think there's a ton of work to do to improve the culture at United. Their whole over-booking and dismemberment procedures in cases of overbooking look like they're badly in need of a total overhaul to me !