Well, this certainly raises the stakes on all geophysical sciences, and any others that have any impact on society.
Seismologists stop giving any statements to public regarding possible seismic activity, because if they happen to be wrong they can be sued for damages. For example: They make a prediction that causes a large scale evacuation and no quake comes? Pay for the evacuation costs as well as the stress and fear caused on people due to their completely wrong prediction. On the other hand if they make a prediction that can be interpreted that no quake is likely (protip: They are never likely - large quakes are very rare in human life span), obviously they can be convicted of false prediction.
But wait! That's not all!
Meteorologists are now in similar position. Let's say they fail to predict a massive snow storm, there's no time to prepare for it, and hundreds of people die in traffic accidents, plane crashes, or exposure. Aren't they, then, equally guilty of false prediction that put people in harm's way?
What about geologists, then? Let's say a geological survey suggests abundant source of high-concentration ore of some valuable mineral, or maybe an oil or gas reserve - and a multinational enterprise invests millions, if not billions, in massive mine or drilling operation - and then the amount or quality of the ore or oil or gas falls well short of what the survey predicted?
The mining or oil corporations should be able to sue the geologists in this kind of situation, they have caused them massive economical losses and should definitely pay back to the company. Making them indentured servants until the damages have been paid sounds good.
Engineers and architects, too, should be put in charge for any structural failures of their products. They were caused by material defects or errors in production or construction work? Doesn't matter, they should have predicted that and designed the products so that they would work even if they're made of silly putty and assembled by a horde of spastic rhesus macaques. Building inspectors and aircraft mechanics, especially, should have a preternatural sense of detecting hidden defects that are not clearly detectable by the diagnostic procedures they are working from...
Doctors should totally improve their track record of diagnosing illnesses that patients don't complain about, or making false positive diagnoses on no grounds.
And what about all the general research on some wild lark theory that ends up being falsified by the research? Massive waste of time! They should no better than to waste the tax-payers' money on nonsense like that. Why don't they research things that produce positive results?
I can probably think of other similar examples for the future of scientific professions in Italy after this ruling, but this should be a nice start.