As I stated when we decided to silence them. They were silenced for en masse harassment and spamming. Dozens of users continually contacting users on our server after blocking someone despite being asked to be left alone. An issue that persisted over days.
We made it clear to the administration that should the moderators policy change to ensure this would not continue to be an issue from them we would be happy to remove the silence.
Should tell you something when our silence list consists of only two servers, one of which is spinster, the other is a single-user instance.