2. There may be some situations where she has to hide the fact she's Borg.
Seven still has her ocular implant, and she's undoubtedly one of the most famous people in the Federation.
Early TNG it was suggested that the Ferengi were carnivores/cannibals. That was retconned pretty quick within TNG's run.
That was never really intended to be anything more than a rumor about a foe the Federation hadn't met yet and knew little about. The developer of the Ferengi, Herb Wright, disapproved of the inclusion of the line about the Ferengi finding their business partners "tasty" in "Encounter at Farpoint," because it was never how he intended the Ferengi to be portrayed. As we saw in "The Last Outpost," the Ferengi deliberately presented themselves as scary and mysterious to make themselves seem more intimidating than they really were, much like Balok in "The Corbomite Maneuver." I always figured they spread the cannibalism rumors themselves as part of that process.
I think the same thing happened with the Borg. In "Q Who?" Q said the borg weren't interested in biological life just technology. Yet in" First Contact" the Borg Queen made it clear they have been assimalting for "thousands of years"
The real reason for this change is the writers didn't intend the Borg to be assimilating aliens originally. This change was made to make them more menacing. Notice Guinan said the Borg destroyed her world not assimilated it. She also said the borg have been "developing" their technological components for thousands of years. No mention of assimilation.
The real reason for the change was to make the stories more personal. You can't tell a lot of stories about fighting an impersonal force of nature with no awareness of individual people. That's basically a disaster movie. You can certainly do a story about your heroes going up against a hurricane, but you can't keep bringing the hurricane back as a recurring threat; it would get repetitive quickly. So the Borg had to be reconceptualized to operate on a more personal level, one more conducive to storytelling. So they were rewritten to be interested in assimilating people, and Picard was taken to be a spokesman (an idea that always seemed implausibly contrived -- why should the Borg care about propaganda?). Then we got stories like "I, Borg" and "Descent" focusing on the experience of ex-drones discovering individuality. Then we got the retcon that the Borg had a single Queen to speak through, and assimilation was changed from something done to whole civilizations to a zombie-movie attack on individuals who were turned into members of the horde. And so on.
Of course in English "You (singular)" and "You (plural)" are the same word.
Yes, exactly. To the TNG Borg, it would only be plural.
Where is the evidence in Q-Who to say they reproduce?
RIKER: From the look of it the Borg are born as biological life form. It seems that almost immediately after birth they begin artificial implants. Apparently the Borg have developed the technology
That doesn't mean Riker is right. We know from Voyager that the Borg assimilate babies and children, we know they put those children into maturation chambers until they have matured long enough.
It's not about whether Riker was right, because Riker is a fictional construct, and so is the world he occupies. So whether he was right or not can change depending on who's telling the story. The writers of "Q Who" no doubt intended him to be right when they wrote the scene, or they wouldn't have written it that way. Later writers changed things so that he wasn't right anymore. Of course the later version becomes "true" in-universe, but it's still worth stepping outside the universe, being aware of the series as a fictional creation and being informed about how its concepts have evolved over time. You can't fully understand the thinking behind an earlier story if you mistakenly back-project later writers' assumptions onto it.
In any case, the intent of "Descent" was that the entire population of Hugh's liberated cube were turned into blank slates with no names or identities to fall back on, leaving themselves vulnerable to Lore's cult-leader manipulation. That's hard to reconcile with the
Voyager paradigm. Were all the drones on that cube, thousands upon thousands of them, assimilated as infants? How does that make sense?
We pretend that all the Trek shows represent a cohesive reality, but the fact is, the TNG version of the Borg and the FC/VGR version were significantly different entities that can be difficult to reconcile.