Yes, I agree that this is currently a vulnerability of Bitcoin and it most definitely needs to be resolved. A simple solution is not so apparent. You're quite well versed with Bitcoin intricacies, can you propose a solution? But in the meanwhile, wouldn't it be helpful for SatoshiDICE to cut down on the spam while we get this thing fixed?

Just because Bitcoin has a weakness doesn't make it right to exploit it for personal gain.

There's an ocean of difference between doing what's right for you, versus doing what's right.