This is an excellent example of how platform holders will allow absolutely anything unless they're under some sort of public pressure. The extremely sensitive nature of this topic has probably helped keep it out of public discussion until now, so Google's been half-heartedly addressing more visible misuse of their platforms while letting these creeps roam free. If what you've said about these users is true, that many of them have their real names listed and how many there are, there is absolutely no excuse for Google not to have stamped this out by now. This is such an easy target that they must have looked at it and specifically decided they're not willing to do anything, otherwise it would have been obliterated long ago.