I don't think revenge has been the motivation of the British penal system for some while, but there are a lingering few who fail to realise that it is impossible to run a judicial system according to gut reactions. I do feel, however, that the release of the two in question was premature. Their age at the time doesn't improve the nature of the crime, and by the time they were 18 they should have been old enough to understand the seriousness of it and why they should be in prison.