Custom Data Fields applied to actions

It would be ideal if custom data fields could be included in the actions select box of the list view after a search.

Example: I have a custom data field called staff initials. It consists of a bunch of checkboxes, each with a set of initials next to it. If a staff member wants a contact to be in their "personal contacts", they check off their initials. Then they can do an advanced search for all contacts within their personal contacts.

What I would like to see is to do a search, get the results list like always. Then check off 20 people, and from the actions select list I could see "Add to Custom Data" or something, that then prompts me for what custom data I want to add them to, and I could check off my initials, and these 20 people would then be part of my personal contacts.

I know that I could do this with tags, but other custom data fields could not be accomplished that way. Plus, I am trying not to clog up the tags area, and this is a separate function.