I'm of the philosophy that most of us do not "need" to wear a bra. I do have a couple wireless soft bras for certain outfits or to use in the early stages of bfing when leaking is an issue. But I primarily rely on camis or nothing at all if the outfit is conducive to allowing my breasts to be free, and I embrace a natural approach to this part of our anatomy.
My 9 1/2 yo dd is just showing the beginning signs of starting to develop. (I started developing even earlier, at 8, so this is not altogether too surprising). I would feel hypocritical insisting she wear a bra, but I think soon she'll probably be more comfortable if she has some kind of under-layer beneath her shirt. She hasn't expressed a desire for a bra yet, but I'm worried that she will think she has to have one at some point, and I want to be prepared to offer her alternatives and be explicit that it is her choice and she doesn't "need" to wear a bra if she doesn't want to. What alternatives are there for developing girls? Is there anything better than just suggesting she wear a cami? (Incidentally, it is highly disturbing to me that when you peruse the undergarment girls' section in most department stores, you see a plethora of underwire "push-up" style bras for tweens, and only a few of the old-style cotton "training bras" that used to be the only thing available when I was hitting adolescence. Anyone else feel this is a dangerous trend?).