Petallus welcome back, a late reply to your post but I have been away. I described ticking 'unskilled working class' as stupid because all the other demographic information I had given them indicated this was not true. It was not a judgement on people who fall into this group. If I had given demographic data that suggested that I fell into the unskilled working class group I would have ticked 'aristocratic'.
What I objected to was the stupidity of the whole question. The questionnaire had already asked questions on age, gender, occupation, income and savings (it was a questionnaire about attitudes to money). There was no need for a question on class, least of all one that subdivided people into so many groups. Faced with a stupid question I chose an answer that conflicted most with the data I had already given, I could also have ticked 'aristocratic' but this smacked of personal agrandisation. I felt more comfortable ticking 'unskilled working class'.