When that law is applied legally but in a spirit of entrapment, for citizens who
are otherwise law abiding, you now have “ivus hadin” perversion of the law.
“The location is known to have traffic police monitoring the street
for infractions on a consistent basis,” says YWN. And being
“otherwise law-abiding” doesn’t mean an instance of law-breaking
should be ignored.
(Also, I don’t think that’s how the term ivus hadin is usually used in a Torah context.)