Christine Assange says a British student organising a protest against her son is unwittingly aiding the misuse of rape allegations as a political weapon.

Simone Webb is gathering support for a January 23 rally at Oxford University to coincide with a video address by WikiLeaks founder Julian Assange to the exclusive institution's Union.

She claims she's become a victim of abuse via social media for organising the protest against Assange, partly for his evasion of sexual assault allegations.

Ms Webb has told AAP she blocked Ms Assange on Twitter after receiving a barrage of messages.

In one tweet on her general feed, but not sent to Ms Webb, Ms Assange said the protest was being orchestrated by a "a gang of rabid, irrational frenzied 'feminists"'.

Ms Webb said she was organising the protest to highlight "the inappropriateness and irony of having someone speak at an awards ceremony supposed to celebrate integrity, justice, courage and truth-seeking who is himself evading the justice process by hiding in the Ecuadorean embassy".

"Secondly, this is about challenging society's treatment of rape allegations, and the way they are minimised and ignored," Ms Webb said.

On Friday, Ms Assange said Ms Webb was in fact damaging the very cause she claimed to espouse.

She called on supporters of Assange and WikiLeaks to stage their own silent vigil to counter the protest.

"I call them faux feminists. They are not actually defending feminism," she told AAP.

"They are not defending inquiry into genuine injustice and they are not defending the cause of real rape victims, because Julian's case is being used in a political persecution.

"She's not out there saying what the UK Women Against Rape are saying - that the genuine distress of rape victims is being used to bury a journalist.

"Even eminent feminists like Naomi Wolf and the Swedish feminist Helene Bergman have stated that this case is political."

Ms Assange said rape allegations had been historically used in cases of political persecution.

"I would support anyone's right to protest, once they've looked at the facts," she said.

"But Ms Webb has refused to look at the legal facts of this case, which we've sent to her, which indicate that in fact Julian is not a rapist, and neither of these women accuse him of being a rapist."

She said the only Twitter messages she had directly sent to Ms Webb were some of the facts about the case.

She said she'd also observed that Ms Webb seemed to be enjoying the attention around the protest, after Ms Webb tweeted that it was an exciting experience.

Assange has been invited by the Oxford Union to speak at the annual Sam Adams Award, which recognises an individual who has displayed "courage, persistence and devotion to the truth" in the name of the former CIA analyst.

The 41-year-old is expected to make a video address as he faces arrest if he leaves London's Ecuadorean embassy, in which he took refuge last August.