So this guy was a bit mental, and decided that his hobby was to amass a literal "Periodic Table" on display, in his home? Did he have, like, a lot of friends who often dropped by to admire his Table and encourage him in his progress? Or, more likely I suspect, he was a lonely sad sack who would do anything to attract another human being's close interaction.
It also seems that he was amassing a lot of broken junk. Are there, like, photos of his collection, because surely it could not be overly attractive or neat? If he is basically collecting obsolete and unwanted crap then that is a sorry excuse for any "home display".
And yes, perhaps all this material in one place was 100% safe for our hero. Fine. But still, when he has visitors over, can he guarantee their safety too? If a dozen other people got this same "collector's bug" and amassed such a collection, could they also do it 100% safely and legally?
I hope that the outcome from this case is that they can engage a social worker and an agency to help him tip all this rubbish into the bin and find some productive, social hobbies that will enrich him and somehow help with his challenges of mental illness. The last thing a mentally ill person needs is to be isolated with a barely-legal, dangerous hobby. Sheesh.