I totally agree with you.. A lot of unconfirmed transaction in bitcoin now. I thought I was the only who noticed this one. That's why I did not have any transaction with bitcoin started last day.
Yes this is a nice idea, although i do not believe people will do this and if just in case we do this for a day most likely the next day transaction after the blackout will just be doubled.
The blockchain really need to have a breather but somebody should think a permanent solution.