AOG - History on the section shows that you show considerable interest and concern in what you rather unfortunately term 'black on black' violence.
However, comparing one situation with another in the hope that an appropriate comparison can be made is futile.
Is a knife murder more tragic than a stupid tasteless prank?
Of course it is - but there is no viable comparison in terms of which we should be more concerned about - since it is absolutely possible to be concerned about both, and by no means equally.
Your apparent inference is that because the media is enjoying a field day because a stupid prank has enabled the papers to whip up their readers into a storm of self-righteous indignation - and that sells papers, which is entirely the point - that the seriousness of knife crime is somehow viewed as less significant, either in terms of media exposure, or police resources assigned.
I think this conclusion is flawed.
I believe that society is concerned about knife crime - far more than it is about stupid people doing stupid things, and we should not allow the distortion of interest created and encouraged by the media, to divert us from simple reality.
Sadly the crass stupidity of morons with a bonfire is always going to present more newsworthy (read sales increases) fodder to the media, which is why there is this apparent dichotomy in terms of coverage.
As long as we remember that national media coverage only equates to national interest, which is often lightweight and fleeting, and does not reflect the deeper concerns of society over its rightfully deeper concerns.