i had that problem with one of my campy cranks, some guy messed up the extractor bolt threading on the crank ,

yes it is reverse thread to get it off and it was pretty hard to find a small enough pin spanner tool to fit into the pin holes, the LBS took it off for me kinda, i too would like to know what tool is required for removing the extractor bolts, i'm sure it's a campy made tool but don't know which one.