I feel the opposite, or that your optimism about exploiting the GHOST vulnerability is silly. PR firms aren't paid for good judgement. Lets see your cellphone and router exploits for GHOST, and then worry. Since you bring up cellphones how about these vulnerabilities http://www.extremetech.com/computing/170874-the-secret-secon... These sound much worse. You can brick a phone etc.
That's a non-sequitur -- busybox isn't a replacement for glibc. In fact, the busybox package included with Debian is linked against glibc, and I would assume the same is true for most other distributions.