Retribution doesn't neccessarily take place only in a physical attack. It can take the form of damaged relationships, harrassment, ostracization and many other things, none of which would be reported. You don't know what these people are being subjected too.
IMO if these people have asked to remain anonymous they should be left in peace. They have good reason to be afraid if the sentiments expressed in public on the internet are anything to go by.
How can a fair verdict be reached in any high profile case if the jury has to be concerned about how the verdict might inflame some part of public opinion against them personally? Personal fear should not be one of the considerations to be taken into account when reaching a verdict.
As for hopes of a hung jury, keep in mind that this jury aquitted, which means that even if there were a few who initially thought guilt and later changed their mind (remember, a jury has to try to achieve consensus, a hung jury results when that consensus cannot be reached), most of the jurors would either have voted initially for aquittal and those who initially though guilt were not convinced in that belief.
Also, remember that while most people here were convinced of guilt, the question was far less clear cut among the general population, which is where real jurors come from. I do not believe that it would have been easy for the prosecution to have ever convicted her of those charges for that reason. The evidence they had was simply too weak, not that they didnt have evidence that something happened, just that they didnt have evidence of who exactly that someone might be, or what exactly that something was. That was the real problem they faced and with 12 people in the room the chances of getting all 12 to overlook that was not good.