What is the ruling on removing subscribers who post inappropriate pictures after being advised, and is one sinful for not removing them, knowing that removing them is the only available solution?

If the interest of the Da'wah (call to Islam) conflicts with the harm of images on the profile pictures of some individuals in WhatsApp:

- If you do not look at the images, and no one else sees them, and you hope for the guidance of those being invited [to Islam], then there is no harm in keeping them. - If you do not expect their response, or you fear for yourself or others from these images, then you must delete them.