But you mentioned people who empty the rubbish, clean windows, djen - people who work hard for a living, are respectable and responsible adults (one presumes) who will bring their children up to be the same.
ethel is talking about the irresponsible, the workshy and drug addicts as neighbours whose children know no better - and I have friends who have attempted to teach these children and have been threatened (and thumped on at least one occasion) by their parents if they dared to suggest their child could be a problem in school.
And yes, mine all went to very 'mixed' schools as there is no choice in our area. So I have seen it from the point of view of a parent and from the point of view of teachers who were my close friends.
And twice, in different areas of the country, we have experience of travellers parking themselves next to DGC's schools and the mess was indescribable. Their children were urinating and defecating in the hedge between the waste ground and the infant school.
There are different types of travellers, but I am sure you know that!