I do that on every forum, whether using my regular computer or my iPhone. Every so often a quick CMD-C on the computer or a Copy on the iPhone, and then for sure one at the end just before I hit Send.
I do NOT like it when the web site does not accept my Reply and I have to rewrite it.
I know people who write a dozen paragraphs without ever doing a CMD-C and then complain for another half dozen paragraphs about how they lost their Reply!
And don't get me started about people who don't do a CMD-S as soon as they start a document and then every couple of minutes afterward.
Oh, and I think the SmartCover is cool, and if you want to protect the back more, get something like a GelaSkin. (Back on topic!)