You really don't have to make up a guy/situation to be mad about. This also isn't really a new law, just different possible penalties for an existing law plus a longer statue of limitations, so if your theoretical situation happened, you can go back and see how it played out. Are the new possible penalties too harsh? Well, there is even a built in review process for that:

Due to concerns expressed during the Diet deliberation process that tougher laws could curb freedom of expression, the revised law requires examination by an expert panel three years after its enforcement.