The group of about 16 protested at the ANC's Tshwane offices against the outcomes of a branch general meeting held in Hammanskraal on Sunday. The group claimed armed bouncers stopped them from participating in voting to elect a new branch committee, the Pretoria News reported earlier this week.
A committee was elected after they had been forced to leave the venue, the women claimed. They said they were groped and slapped on the buttocks while being escorted out.
The ANCWL said ANC members should not "initiate unethical acts of indecent exposure".
"Women must always carry themselves in an exemplary manner in society." Their behaviour was "anti-ANC" and if they had a grievance they should lodge a dispute via internal party channels.
In 2008, ANC Youth League members bared their backsides at the conference in Bloemfontein where Julius Malema was elected league leader.