I actually really like this idea. There are so many random things on github that get broken over time. The implementation though clearly is problematic and github has no choice but to block this behaviour.

I could image though a system where there was some sort of community managed github bot. Developers could submit pull request to the community service to fix common issues. Github would then run the service nightly themselves. Developers could opt-out of the service if they wanted. Something like this could be very handy for many things - security issues, typos, broken links, etc.