I suppose it was mainly what I perceived as the anti-renter prejudice in the posting I quoted which struck me, Jon. So far as the childless are concerned, it may be, I agree, that they do not need to worry so much about toxicara canis as people with young children. But my impression is - someone will no doubt correct me if I am wrong - that the risk of toxicara from dog faeces deposited on pavements (as opposed to parks and playgrounds where toddlers are likely to be crawling around) is pretty tiny. The main objection to dog droppings on pavements is, I have always thought, an aesthetic one. I felt moved to challenge any implication (perhaps unintended) that childless people were likely to be more feckless and less concerned about living in an unpleasant environment than those with children were.