OG Non-Member Post

This module creates an entity selector that lets non-members to post into Organic Groups.

This module leverages Entityreference Prepopulate's "non-member create" permission in groups; if the group has non-member: create checked then the group will show up in the widget list.

The module also checks to see if a particular user has edit or delete, own or other, on the node and allows them to do that if they're not group members.

Mandatory disclaimer: Don't use this in production. Really, don't do it.
Credits: Code nicked from @Amitaibu and @ezra-g in #1961296: Refactor og_group_ref field per OG API improvements