Frustrated with parking violations, I said jokingly:
Franchement, qu’est ce qu’ils n’ont pas compris dans « défense de stationner » ?! Je n’en peux vraiment plus, de ces conducteurs qui font fi de toutes les règles ! Si j'étais à même de coller des contraventions, ça rigolerait pas, moi je te le dis !
What I meant by this phrasing was that I would take a really tough stance and crack down hard on parking violations – so much so that there would be hell to pay for such violators!
I usually associate this expression with a positive context where you find yourself impressed by something, so I'm not sure if you can use it as a harsh word, albeit jokingly.