Calling these people 'yobs' is rather describing a famine as 'a situation in which a few people might not always eat a full meal three times a day.'
They are murdering scum and should be permanently elimated from society. It is a pity that the softly softly approach does not allow for this, and if they are caught they will probably end up going to a correctional institute where they will sit and watch daytime TV on widescreen TVs whilst food is brought to them on trays.