Missing the point?

Somebody with clearly nothing better to do has done a survey of the sort of litter most frequently dropped on the ground.  It seems that Coca-Cola cans, Cadbury's chocolate wrappers, Walkers Crisps packets and McDonald's takeaway bags are the worst offenders.  But surely this tells us little - it's not the products that are responsible for the litter, it's those that use them.  If it tells us anything at all, it is that the sort of people who eat and drink this sort of stuff are also the sort of people most likely to drop their rubbish in the street rather than keep it until they find a litter bin.