Well I tried running some steel wool over one of the plugs with the discoloration and it just made the discolored area larger, so I do believe the shiny finish is coming off due to corrosion. Now the sludge could be bacterial since there is some sort of fuzz/hair on the plugs and inside the blocks from what I can see ( I will be taking them apart for further inspection tonight ).
I also don't see how I "got served". I agree that the EK problem is atrocious. No way should any production block start corroding within days.
I just wanted to show that what happened in a few days for some unfortunate people should not have happened for at least a couple of years. Or even longer if regular maintenance is performed. ( although the EK customers obviously had no chance )