I'm not sure what you are getting at, the earlier comments were not presented as rumor, they were very much direct comments on the accused and his past actions. That's very different to musing over what happened to a Malaysian airliner which won't be investigated by judge and jury, but by a panel of inquiry.
Sub Judice applies to significant crimes that are put before a Jury. Not many cases on PPrune are similar in nature, as we all know its not common in aviation to have this type of thing occur. But as per the warning guidelines, courts can summon information from this site including IPs and such to Identify individuals, so you are not protected by anonymity from a court action, unless you are some high level hacker (PS VPNs and false routing technology wont protect you).