Sharing family photos without putting them everywhere

Sending a family photo to a few relatives can quickly turn into the same picture appearing in several chats and public profiles. The person taking the photo may be happy to share it privately without agreeing to a wider audience. This gets especially awkward when children or people who dislike social media are in the picture. How do families agree on a boundary that is clear and realistic? A shared album sounds convenient, but the conversation about who can forward or repost pictures probably matters more than which service holds them.