take the perpetrator to court, although you should not be surprised if you find the authorities are not especially enthusiastic about helping you.
there are so many threads that the judges have not even commented on, only the high profile ones, they don't seem enthusiastic about helping anyone, but hey, theres what only 2 for 100 threads?
New Judges need to be hired if you wish to suggest people make new court cases, it's with all respects, a joke.