It already happens in the spheres that matter to us incomparably more than our hobby. In monetary terms. Just a few examples where it is legislatively established that everybody must pay for the damage done by somebody: car accident insurance, health insurance, and the public damages from crime and our penitentiary system. These payments affect our life greatly as insurance premiums and taxation. It's already accepted and imbedded in the culture of irresponsibility, most everyone thinks in those terms, and extending it to fish would only be natural to the public at large. It will be thought of so natural that people will be thinking "There ain't anything else we can do!".
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I became aware of the recent situation which I try to not divulge. One of our dearest MFKers, a great, benevolent, and highly experienced contributor and friend, in the USA was paid a surprise visit by 7 armed fish and wildlife rangers in full gear at his home, who confiscated his beloved, very precious and most unique pet fish (not a dangerous kind at all) because of the recently passed prohibitive regulation. Now if there ever was a guy who would keep his pet right, it'd be him. It crushed him and spilled his guts on the floor, figuratively speaking.
Another MFKer suffered the same fate 2 weeks prior with the same fish species.
BTW: they use MFK to keep track. Yes. You're welcome. We are all on the radar and the surface-to-air missiles are loaded and pointed. We better prove to be the beehive of knowledge and positivity, not a hornet nest of troublemakers.