Earlier quoted context omitted.
That approach is a risky one: a) http://news.bbc.co.uk/1/hi/england/london/6947744.stm b) You are directly trying to impose your value over someone else's value, with the assumption that you are correct. One has to be very careful sure you are not just projecting your frustration at the littering. What they are doing is completely correct for their worldview, which has a boundary round about where their clothing is.…
1. The murder in that news story was not triggered by the anti-litter. It seems highly likely that he murderer was already out for blood. 2. Litter travels beyond the boundary of the litterer's clothing, so I do not see the consistency of your model.
What makes you think that? From the story it seems clear that the confrontation took place due to the victim questioning the murderer's right to throw litter in to his sister's car.
Sadly, young men who would kill over such a minor thing as this are not uncommon in London.