Not sure how to add this to the entry, but using a Bottle of Black Wings Absinthe from within the inventory has an option to "Invite a friend to share the bottle" which (if accepted) yields both an attribute gain (+5 CP Shadowy) and a menace gain (+1 CP Scandal for sender, +3 Scandal for invitee). Not significant most of the year, but it does add a social dimension to Hallowmass menace collecting, especially for players with reliable access to absinthe via the Bag a Legend! ambition.