Top-up fees would "institutionalise" barriers to less well off applicants, the students union claimed.
But the Spanish Students Union, which organized the strike, said 80 to 90 percent of high school students participated.
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The university and the students' union said posting details of indecent behaviour could result in disciplinary action and warned that the internet was governed by defamation laws.
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And it claims no elected officer of the students' union comes from a unionist background.
His public defence of tuition fees led to his life membership of the students' union of Southampton University being revoked.
The students' union at Oxford University has expressed its "outrage" at the proposals and has called on the university to speak out against top-up fees.
At Oxford University, the students' union president, Kirsty McNeill, told BBC News Online the introduction of top-up fees would drag the university back to its Brideshead image of social exclusivity.
Aaron Porter, president of the National Union of Students, rejected the criticisms of a graduate tax - which the union supports.
The student body, the National Union of Students-Union of Students in Ireland (NUS-USI), said the proposals would mean thousands of 16 to 19-year-olds would not be able to continue in education.
The number of students from the European Union (EU) enrolling at Scottish universities in the last year has increased by 7% to almost 17, 500.
BBC: Increase in number of EU students at Scots universities
In Britain, too, students from distant lands help to balance the universities' books: fees for students from the European Union are capped at uneconomic rates.
The National Union of Students rejected the attacks on a graduate tax as "baseless scaremongering".
Aung San was president of the All Burma Students' Union before joining the Dohbama Asiayone, a group of young nationalists.
Toni Pearce, from the National Union of Students, welcomed the action.
Ian Larsen from the university's students union has been involved in organising the event which will be held on Wednesday.
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An adviser in the university or students' union can take you through the system in full if you have further questions.
Robin Parker, president of the National Union of Students Scotland, said the report and its recommendations were a "particularly welcome and timely plan".
But the National Union of Students was concerned that the demands of specific employers would have too significant a role to play, at the expense of individuals' development.
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Lowering the voting age for all elections is a long-standing SNP policy, and the party says it has been backed by organisations including Scotland's biggest teaching union, the EIS, as well as the Scottish TUC, National Union of Students and the Electoral Reform Society.
Liam Burns, president of the National Union of Students Scotland, will speak at the event.
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The committee also heard from student representatives, including Garry Quigley, president of the University of the West of Scotland Students' Association and Christina Andrews from the University of Stirling Students' Union.
President of the National Union of Students Liam Burns said Mr Milburn was right to say the government should immediately cease funding "fictional, partial fee waivers", but added that reducing upfront financial support would also have questionable merit.
The National Union of Students is promising to campaign directly against Lib Dem MPs who back the fees increase, arguing that the change will deter people from poorer backgrounds from going to university.
Michael Russell, also told the Scottish Parliament they would look at charging European Union students in the same way as they do in Ireland, when he delivered a ministerial statement on higher education funding on 16 March 2011.
The National Union of Students would like to see a national bursary scheme to help poorer students.
The National Union of Students (NUS) has said students must be a priority as universities "thrash out" details.
More than 1, 000 delegates have arrived in Sheffield to take part in the National Union of Students (NUS) annual conference.
The National Union of Students (NUS) welcomed the rise in applications but said an urgent expansion of places was needed.
The National Union of Students said the state should pay for higher education - but that high-earning graduates should pay more.
BBC: Glasgow University principal says consider graduate tax
The National Union of Students expressed "grave concerns" over the funding proposals.
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