This is likely to be the thin end of the wedge and there will be no turning back.
The theory is all fine and dandy if we get hard hitting and full execution of the new bylaw by the fisheries officers. But you're still trying to put out the volcano with a garden hose. The victim will be the easy target again - you and I. Sadly, all too often, change such as this only penalise the innocent whilst the criminal carries on the deception - business as usual.
We would need to have real tangible evidence that the fisheries officers have the will and the capability of enforcement to a very high degree. History shows little promise, the MLS is evidence enough of that. If they are not capable of preventing undersized fish being landed and sold blatantly, despite being fully covered in law, what make you think this bag limit will work.
If I had the task of stopping the movement of black fish I would be investigating ways of hitting the buyers as well. Prevent the buying of black fish and the business collapses.
Rarely, if ever have I landed more than 6 bass per angler, but I do not wish to have the freedom of choice removed. It is my right and my freedom to choose when and what I take for my own use. There has to be another way of dealing with the scumbags other than taking away the rights of honest and well minded recreational anglers.