Hi,
at first this may seem completely out of mind, but some might find this useful - having an option to allow/disallow being gifted by other player. It might work at 3 levels: no gifts, gift from friends only, gifts from everyone. It would protect from receiving unexpected gifts from someone (stranger or freshly met fellow player) who would like to enforce some level of submissivenes/obedience in due course.
Thx,