Hi MacK,
Melonie would definitely have good input. I'm certain ninjrk would have very good input as well. Possibly others, too.
My lay-responses to yours

:
1) Ah yes. I believe you're right there. I don't know what the hell I was thinking, but I was pretty tired when I posted last time. So yes, the injections will penetrate the skin. Same can be said for insulin users as well, though.
2) Agreed, every needle stick carries a risk of infection. I don't think I'd stop at just an alcohol swab, though. Being intimately familiar with body pierces, I would definitely opt for generous swabs of Betadine instead. Oh, and we'll use sterile disposable latex gloves as well.
3) Yes, an implant and fill tube are foreign bodies, but arguably the most sensitive to the body during the healing phases. I'm definitely not a health expert, but my understanding is that the risk drops off asymptotically over time. So if you can make it to 8 weeks with no adverse infectious reaction, you're probably in the clear.
I do wonder though, if the friends of 34G's were perhaps a little overenthusiastic about filling, and maybe within the first few weeks decided to kick it up a notch (or two or three).

I really don't know, but if you ponder that there's a foreign body, elevated white blood cell count during the healing process, and perhaps somewhat fresh sutures, one's overzealousness on topping up might possibly bring on a rather unfortunate infection.
On the flip side, there are occasionally women who don't even get post-op expandables, but end up with post-op infections. So maybe it was just the luck of the draw.
At any rate, unless we win the lottery, I still can't see taking off lots and lots of time from work to jet-set between here and Kansas City. This could be much ado about nothing, as Dr Baeke might already have a solution in hand for patients who want to fly in and return home soon afterwards.