When I lived in NC (OC state), I occasionally saw people who chose to open carry. Nobody paid much attention to them, even in places like Wal-Mart. The people didn't have any type of attitude other than "normal person" and didn't attract attention.
OC isn't an option in SC, at least not yet. Not sure if I'd open carry, but I'd like to have the option.
If that TX petition is open to out-of-staters, I'd sign.