Are photographs of a mother breast-feeding her child indecent? The social networking site Facebook has sparked a massive online debate — and protests — and after removing photos that expose too much of a mother’s breast.

Facebook spokesman Barry Schnitt said the website takes no action over most breast-feeding photos because they follow the site’s terms of use but others are removed to ensure the site remains safe and secure for all users, including children.

“Photos containing a fully exposed breast (as defined by showing the nipple or areola) do violate those terms (on obscene, pornographic or sexually explicit material) and may be removed,” he said in a statement.

“The photos we act upon are almost exclusively brought to our attention by other users who complain.”

But Facebook’s decision to ban some breast-feeding photos has angered some users, including U.S. mother Kelli Roman whose photograph of her feeding her daughter was removed by Facebook.