Many dark pattern designers, would claim 'bad design' as the excuse. Its hard to read intent, and hard not to suspect malicious intent when there is a cash value on the upside of the 'bad design'.

I have another one - when you pay cash at a machine, and it does not give you the best change, but gives you the heaviest change. Oh and 4-way traffic management guaranteed to cause a huge traffic jam in the name of health and safety, when cars and drivers (and pedestrians) would better manage the road themselves without any assistance. (I suspect the traffic management is training for us to get used to degrading of the roads, so that 'self-driving' cars are able to navigate diversions cos of the traffic lights.)