St Hilda's acting principal Geraldine Corkery said it was concerning the "babe of the day" trend had moved to high school pupils.
"We don't like it when our students are stereotyped or objectified, because they are actually inspiring young woman in their own right," she said.
Asked if there was concern pupils who had their images posted on the site could be left vulnerable to sexual predators she said: "Absolutely yes."
The page also raised issues about the privacy settings young people chose on websites like Facebook, as she was under the impression the photos of St Hilda's Collegiate School pupils were not put up by the girls themselves. She also called on the person behind the page to take it down.
Columba College principal Elizabeth Wilson, who had not heard about the page until contacted yesterday, said she was "very disappointed" to hear about it.
"The school will have to look into it."
She believed Facebook and social media "had its place", but it was important pupils used the sites appropriately.
"I think education is the key to this; keep talking to young people about the risks involved with certain types of risks on social media."
One of the administrators of the site, who wished to remain anonymous, defended the page yesterday.
"I and the other two admins of the page are aware that the page may look a bit creepy but as all three of us are high school students and under 18 ourselves we don't think we are doing too much harm," the person said.
There had been only one request for a photo to be taken off the page and they had quickly obliged.
Police community relations co-ordinator Sergeant Matt Scoles said the page - which was most likely not illegal - was part of a worrying trend in the way youth were using social media.
"A lot of it extends from a significant naivety from parents and caregivers ... and a lack of supervision around the use of computers," Mr Scoles said.
Parents could not afford to have their "heads in the sand" and should set rules around their children using social networks.
These rules could include only being allowed to use a computer in the lounge or not allowing them to have a Facebook account unless they were "friends" with their parents on the site.
"We have to keep banging home the message that there are some not very nice people around ... and they spend a lot of time on these sites looking for impressionable or vulnerable kids."
