:O) appreciating inventiveness, but am not supporting the concept in practice (for general members & guests: orphaned photos lacking any context or appartenance).
PM attachment function is deactivated, this will not change.
Forum PM is provided as a basic service for chat \ initial contact.
For any kind of elaborate conversations use the bigger & much better PM > email.
Refers to any email service that provides all needed\wanted\crucial facilities > @google, @yahoo, @outlook, @whatever
The forum email button, an easy way to (along with a few words) provide your email address to someone you want to communicate with. Recipient email address is not disclosed. Members must have activated "Allow users to email me" in Profile.