This feature would be helpful since all the chunks I need in my world are already generated. I don't want to run a constant check e.g. WorldBorder every few ticks. Also, I believe that no plugin can (cleanly) block chunk generation because there is no way to actually cancel the event. After looking at the source of the plugin NoNewChunk: http://dev.bukkit.org/server-mods/nonewchunk/ it seems very "hackish" and bad for long term. Would you consider adding this feature to Spigot?