Al-Zaidi said the aim was to promote "open discussion" around the topic of rape culture, following a week in which comments surfaced on Facebook joking about rape.
One comment said "if you don't take advantage of a drunk girl, you're not a true WC [Wellington College] boy."
Another comment said "f*** women."
Four students from St Patrick's College in Silverstream were also suspended this week for inappropriately filming female staff members in what the rector described as "a most distressing incident of sexual harassment".
The term 'rape culture' describes the social attitudes that trivialise sexual assault and rape.
Al-Zaidi and fellow student Selome Teklezgi were organising the protest for Monday at 4.30pm along with students Mia Faiumu and Sorcha Ashworth.
"We didn't want just to be like 'this happened, but whatever, boys will be boys'," Al-Zaidi said.
The organisers wanted it to be a peaceful protest.
Teklezgi said they realised the comments posted online were jokes, "but it shouldn't be normal".
"It shouldn't be a joke, rape shouldn't be something to joke about," she said.
Al-Zaidi said there was a group on Facebook called Feminazis, which some of the male students were posting in after news of the protest came out.
"If you know what the Nazis did, I feel like that's another thing you shouldn't be joking with. Comparing us to them, it's crazy."
They said they had 580 people confirm they were going to the protest on the Facebook event, and 250 people say they were "maybe" coming.
People of any gender are welcome.