[Ferret7446]

That's an unfortunate example, as defamation is notoriously difficult to prosecute as it requires proof of knowledge and intent, among other things.

The problem lies in how such a law can be used; unless the law is weak it will likely be abused (but then its effectiveness will also be minimal).

[martin-t]

The issue with many laws is that they take into account the individual case.

If somebody has a track record of lying, it should be easier to prove subsequent lying.

Of course, then the potential for abuse is greater. It's about finding the right balance.