Just for shits and giggles, it should be established that the Federation is somehow in diplomatic relations with the Borg Collective.
Willa: Admiral, Three of Eight is here to see you.
Vance: Who?
Willa: The new Borg ambassador.
Vance: Sigh. Just when I thought this day couldn't get more dreary...
I like that. By the 32nd century, I'd imagine that even with them adapting they'd long be old hat and not too big of a deal.