A speech by Katie Hopkins during a university debate sparked a mass walkout in protest at her invitation.
Rows of Brunel University students stood and turned their backs as the controversial columnist took her turn to speak about the future of welfare, before filing out when she had finished.
Hopkins, who has caused outrage with her views on benefits and the migrant crisis, was left with a half empty lecture theatre for the rest of the event.
Hopkins's invitation to take part in the debate led may students at the "diverse" university to complain, although officials decided to keep her on the panel.
Ali Milani, president of the Union of Brunel Students (UBS), who helped organise Monday's silent protest, said:
Mr Milani, 21, said the union raised its objection to Hopkins's involvement with organisers last month.
A number of students approached the union, which agreed to represent them and organise the walkout.
The union leader said around 50% of the audience were left in the auditorium.
The debate, which posed the question Does the Welfare State have a place in 2015, and had the Guardian's public services editor David Brindle as chairman, was the first in a series to celebrate Brunel University's 50th anniversary year.
Sitting alongside Hopkins on the panel was the university's emeritus professor of social policy Peter Beresford, campaigner for social justice Rev Paul Nicolson, and Harriet Sergeant, a research fellow for the Centre for Policy Studies.
The university recognised the students' right to stage a peaceful protest and said the rest of the debate was "passionate" and the remaining audience "played a key role".
Ali Milani said the union only came to realise Hopkins was due to speak after she announced she had accepted the invitation on Twitter.
He admitted the union had missed a meeting with university officials to discuss the 50th Anniversary programme when the invite list was raised, but claimed there was "nowhere near enough consultation".
The union did not ask for Hopkins to be banned, but urged organisers to reconsider her invitation.
"We raised our concerns from the outset. We said our students didn't want her on the panel," he said.
Responding her column in the Daily Mail, Katie Hopkins said: