NotReadyYet, or NRY, is actually my first addon. I wrote it to both get into addons and to piss off my raid leaders.
When a ready check is issued, it suppresses the window, and automatically replies no.
/nry off will disable it, and /nry on will re-enable it.
Planned future improvements to this silly addon are:
*A gui to display the current status.
*Saving variables to track whether you want it gagging ready checks on a given character.