I can't really comment on what happened in London as I wasn't there, but in Manchester I saw no protesters being violent towards the police, the violence was all one way. Students who were marching down Oxford Rd, or sitting down in an attempt to stop traffic, were roughed up by the police. I saw children being charged upon by horses. As has been said by many before, just marching from A to B doesn't get you anywhere.
If you give a fuck why don't you do something about it? Or at least give us an idea of what you think might stop the fee rises and cuts?