The term 'Self loading freight' in my opinion is actually quite humorous when applied with good intention but there have been in the past a number of people who use it in it's most derogatory form, (should we as passengers refer to pilots as 'Taxi drivers in the air'). So I suppose it swings both ways and would encourage people to look at it's application in context. A friend of mine is a commercial pilot and uses this term with great humour, yet is respectful of the fact that many people are his 'bread and butter'so with this in mind,evaluate accordingly!