Speaking from personal experience - I can vouch for the fact that most students are decent, hard working young people.
I can't think of anyone that I know who would deliberately throw a fire extinguisher from a great height - into a group of innocent bystanders below.
Yet whoever carried out this insane act cannot have been too smart - not a first class honours candidate, surely?
Because in this modern world such actions are inevitably caught on camera - and then broadcast for the world to see - often only minutes later.
The only good thing is that the young man responsible must have spent a really sleepless night - wondering when the knock on the door will eventually come.
And if his friends and fellow protesters have any sense - they'll turn him in without a moment's hesitation - he deserves his fate.
What will be interesting to see in the next few days - is whether those caught up in the wanton violence and vandalism in London - are actually students.
Or the usual 'class warrior' types who are always out to hijack such events - unless the organisers take proper precautions.
Either way the voice of the students is drowned out - and the public will understandably turn against any anti-cuts protesters - whose real aim is to disrupt the streets.