That is exactly how it works where I live. I currently live in NJ, One phone call claiming I am a danger to the chidden for any reason, with no proof of any kind, and all hell breaks loose. It will be 100% up to me to prove otherwise. Let the legal system figure it out later at huge expense and years of my rights lost. Yes, it has happened to people here. I have seen people destroyed by it. I'm leaving for a free state in just under three weeks. I don't need this type of crap becoming nation wide.
No, that’s not “exactly” how it works.
Again, not saying these are good things. They aren’t. However, there is more to it than “my wife or neighbor can phone the police that I have guns and they are then immediately taken away.”
That’s simply not how it works anywhere. Even in NJ, a judge has to approve the order, based on an affidavit, filed under the penalty of perjury, that the respondent poses a significant danger of bodily injury to self or others.
As best that I can gather, NJ issues about 300 of these a year.
If you don’t want these to be implemented in the State that you are moving to, then it would be a great idea to formulate coherent reasons as to why they are bad. I can think of several. Presenting a straw man though, probably won’t be effective.