Digging for diamonds compared to comment spam

So for the poor bloggers who worry about comment spam etc. How about the diamond producers who have to crunch their way through 100 tonnes of stone to find 35 carats (7gram's) of diamonds at The Blaauwbosch mine in South Africa.

According to my calculations thats 0.01ppm or in blog speak 1 good comment for every 10 million comments posted!

So some way to go!