I have a number of avatars, because I tend to "compartmentalize" my moods into seperate SL identities.
For the most part, they are between 5'4" and 6'2" tall. And though they generally are pleasantly feminine in shape (even as Penny herself is) I do still occasionally get an 8 foot tall noob calling me a child.
That's only an occasional problem, though.
My most frequently used avatar, Senga Recreant, is 8'2". However, she isn't human. She's a huge, lanky demoness. I am aware of my enormous scale and I don't expect content creators to scale to me. I am capable of fitting modestly sized attachments (unless they're poorly made to begin with) and even while being enormous, I take the opportunity to warn normally scaled avatars of unshrinkable items (such as in my review of the digigrade 'Koras' boots on the marketplace).
I stress again, I am AWARE of my scale. If i can't explore a build because I'm too tall... i change avatars. Even if I have to change into a micro. I don't throw a fit about it. If i can't fit a pair of boots to my legs, i shrug and bury them in inventory. I don't throw a fit about it. But now I am experiencing the opposite bias that my other avatars do.
People ridicule me for my height, even though I am aware of my height, and I have never ever implied that normally scaled adult avatars are children (unless they are OBVIOUSLY children, breastless, pigtailed, teddybear toting avatars in a sex sim). Penny's personal crusade has been successful to the point where I'm almost at loathe to even speak to someone normal sized, because so often they're so militant about it that they refuse to acknowledge that towering over them is the entire point of my persona and character.