Video -
http://www.bbc.co.uk/news/uk-politics-11566509#video
Oh this is lovely, a guy on there saying the NUS don't represent him, he's protesting against all public cuts, no mention at all of student fees.
Bandwagon anyone?
EDIT: Nothing lends gravity to your point quite like screaming and cheering for the BBC cameras and wishing hello to mum. Seriously half of them are probably just there because it's 'cool' and the current bandwagon, another quarter are there to protest austerity measures, some more are there because it's a protest and they are full time protesters, oh with the odd person who is actually concerned about the impact of fee cap increases.