I am not sure which accusations you are referring to but there are plenty of names attached. Just look at twitter et al. If you mean the names of the abused assistants, yes there names are known even if they are not plastered across the media for your entertainment. One of the unavoidable facts of working in the theatre is that virtually nothing happens without lots of witnesses, whether it is throwing something in the office or humiliating someone in rehearsal. Everyone who has had even marginal involvement with Scott Rudin has stories. This is not The Crucible lol.