Why does one bother? The only significant tag on my carryon is the FT one ... You know, that oversized cheap yellow thing? Love it!! One day someone will say "Hey, you're on FT ... And you're old ... You must be T8191."
The BA Silver bag tag achieves NOTHING, as does the BAEC Silver card that has never left my travel wallet since it was issued. I suspect that Gold tags have a similar 'Yawn' factor, but, hey! They're free too