SE never intended these to be shared by the entire server and I'm sure their network infrastructure isn't happy about it either.
When it gets to the point where peoples character models are being culled and the zones fill up preventing normal residents of that server to be unable to go about their business because they can't enter a zone, it's a problem.
If I happen to be around an S rank that's spawned, I'll join in the hunt. I'm not expecting to make it to every call, nor should anyone.

If anything we need people to stop being salty about what they consider an "early pull" (which by design isn't a thing), and to stop trying to witch hunt people that do initiate combat. Using bully tactics and accruing a mob mentality over these players is anguishing at best. Downright griefing at worst.