We already have this law, it's called libel. You can't say **** about people that you know isn't true, that can cause them to lose money, credibility, etc.
Are you sure that's what libel is? Because as far as I know, libel is publicly, and falsely, defaming someone. It has nothing to do with lying to them. Or is this what the law is saying. The wording is a bit vague.