Allow specific users to view an entry aside from friends groups
Short, concise description of the idea
Provide a text field as part of Custom entry security options which accepts a comma-separated list of user names. (Embellishment of this earlier suggestion.)
Full description of the idea
A friend of mine recently filtered one of her entries to a single user, through the use of a friends group containing only this user. I later realised that my friend had more than one of these single-user friends groups defined. Bearing in mind the imposed limit of thirty friends groups, I had a better idea: allow the user to specify a comma-separated list of user names which would have access to read a particular entry.
The process works like this: the user writes an entry, then selects Custom security. The user is presented with not just a list of currently-defined friends groups, but also a text field labeled "These user names:", in which the user types a few specific user names, such as "bradfitz, jayo, test". Upon updating, these extra users would be granted access to the entry.
An ordered list of benefits
An ordered list of problems/issues involved
An organized list, or a few short paragraphs detailing suggestions for implementation