"Bandwagon effect refers to people doing certain things because other people are doing them, regardless of their own beliefs, which they may ignore or override." In case of HNW - or most of music styles - it's very clear that there are trends of microtrends. People start projects because other people are doing them. And these projects come and go, doing few releases here and there, and then gone. I dare to say, that substance what one can hear from THE HATERS (for example), simply is far more than output of guy who had quick passing "idea" of doing HNW before next interesting thing comes.
Many sonic matters would be up to personal tastes and even mediocre harsh blast may be satisfying for noise addicts. It would be matter of what we appreciate in noise. When The Rita or Vomir came, I feel they stood out with their vision. The next guy doing the same is like next guy painting black square and thinking he is so clever. Without using it as fuel for inspiration, just replicate.
I don't think on needs to approach noise merely by "sound". We become aware of many other factors too.
Lets say, the most traditional social cycle theory. Even if sound of some project is not utterly bad, what is its value if it offers 100% copy of other peoples artistic vision?
Can I tell all "bandwagon jumpers" by simply listening? You know, distinct that THIS is The Rita and THAT is someone else trying to sound like him? Of course not and I certainly won't deny factor of positive influence which results that some of the later works is better than previous. But that's part of what I consider bad quality of bandwagon jumpers - from my perspective. I would appreciate if someone does harsh noise wall that sounds like them. If they ask "how's that possible, I'll just end up sounding like everybody" - then you probably know that he's not the guy that stands out from the mass or is able to do more than follow already existing ideas of other people. And he will do it next with other style, other project, when new trend sucks him in.
When internal possibilities of art run out of fuel, it dies of symptoms of old age like any organism.
As I'm noise addict of some sort, I accept quite high level of influence & cumulating ideas, and appreciate projects that can build something from very basic traditional elements. They all don't need to be revolutionary or utterly different.