Apparently a lot of the recent anti-pirate actions happened after wotc saw their stuff on scribd.com. It is still full of copyrighted gaming stuff. Why doesn't someone sue them?
Because like any other Online Service Provider (including ISPs, universities, libraries, Web sites), scribd has a safe harbor in the DMCA. Provided that they meet certain criteria, including DMCA contact registered with the Copyright Office and following the notice-and-takedown procedure, OSPs are not liable for the actions of their users.
In theory yes, but they could still be sued. I think Viacom is still suing Google/Youtube for similar reasons.
"The judge in one of Sweden’s most high profile case ever is also a member of an interest organisation for one side and associates with the prosecution trial lawyers in his free time?"