Plus it makes you look like an idiot. Why should he drop everything to potentially refund you .00001? Give him some time. Idle miner updates are way more important.
And seriously, there is a lot of people using deepbit, I am 100% confident that everything is running smoothly. There is people making a LOT more cash then me and who are way smarter. They would have double checked the numbers by now.
This is not about refund, this is about trust and consistency. If deepbit somehow lost my 0.012 it might as well lose 1.2 for some of these big guys you mentioned. Btw, there were posts about missing rewards on another forum, so I don't think I'm the only one affected.
Idle miners issue can be solved on the client side by restarting them. And there's a GUI tool (named Phoenix Rising) available that monitors miners and auto-restarts them if found them being idle. I used it and it worked very well for me. Or may be smart people are too smart for that?