You're on a forum full of people that can't wake up loved ones over many years where there was once trust and love. A stranger walking in and shouting things isn't making someone wake up, that's usually more about the person doing the crashing wanting to feel some type of way.
Now, with that said I had a guest on my podcast that crashed his own KH to out his abuser, and he had a long history with all of these people, and that was good for him to take his power back. He also heard from people that were already PIMO in his old hall that he didn't know about. So there were some good results, but primarily for him, and he didn't exactly wake anyone, just flushed out a few that were already awake who contacted him in secret later.
I don't think that it's all bad in all situations, but it may very well drive people in farther in most situations.