1. Q själv svarade på din fråga i säsong två episod 16 när han skickade Enterprise för att möta Borg för första gången - "Q Who".
Borg ser inte federationen som ett hot, och de är inte imponerade över dem som ett samhälle. De vill helt enkelt ha sin teknik och har ingen anledning att skicka en kub tusentals ljusår för att få det, särskilt eftersom de vet att federationen utgör ett litet hot mot dem."The Borg are the ultimate user. They're unlike any threat your Federation has ever faced. They're not interested in political conquest, wealth, or power as you know it. They're simply interested in your ship, its technology. They've identified it as something they can consume."
— Q, commenting during a senior staff briefing
2. Några år senare under tidsramen "Star Trek - First Contact" har Borg lärt sig att federationen inte är så svag som de tänkte och de har något mer att erbjuda än bara teknik. Därför gick de tillbaka i tid för att försöka assimilera jorden och mänskligheten tidigare.
BORG QUEEN (OC): What's wrong Locutus? Isn't this familiar?
BORG QUEEN: Organic minds are such fragile things. How could you forget me so quickly? We were very close, you and I. You can still hear our song.
PICARD: Yes, ...I remember you. You were there all the time. But that ship and all the Borg on it were destroyed.
BORG QUEEN: You think in such three-dimensional terms. How small you've become. Data understands me. Don't you, Data?
(Data is standing in a Borg cubicle)
PICARD: What have you done to him?
BORG QUEEN: Given him what he always wanted, flesh and blood.
PICARD: Let him go. He's not the one you want.
BORG QUEEN: Are you offering yourself to us?
PICARD: Offering myself? ...That's it. I remember now. It wasn't enough that you assimilate me. I had to give myself freely to the Borg, ...to you.
BORG QUEEN: You flatter yourself. I've overseen the assimilation of countless millions. You were no different.
PICARD: You're lying. You wanted more than just another Borg drone. You wanted a human being with a mind of his own, who could bridge the gulf between humanity and the Borg. You wanted a counterpart, but I resisted. I fought you.
BORG QUEEN: You can't begin to imagine the life you denied yourself.
PICARD: It's not too late. Locutus could still be with you, just in the way you wanted. An equal. Let Data go and I will take my place at your side, willingly without any resistance.
BORG QUEEN: Such a noble creature. A quality we sometimes lack. We will add your distinctiveness to our own. Welcome home, ...Locutus. ...Data, you are free to go.
Referenser: "Q vem" -synopsis från Memory Alpha
"Star Trek - första kontakt" filmutskrift från chakoteya.net