No I dont think we should ban herbicides but we do need to work out a way to evolve from poisoning consumers to something a healthier.
When we look back in hindsight many of the practices that are currently accepted will be changed through a combination of regulation and market demand.
The claim that regulation doesn't work is the catch cry of the bankers and various other corporate lobby groups. Regulation is required in media or you have companies like News lte emerge to subvert democracy. Similarly in banking Goldmans take control of the financial industry. In agriculture it companies like Monsanto.
It a systemic issue that invades right to the heart of how we govern ourselves. There is mountains of evidence that strongly indicates that current practices are causing harm to society, overtime these issues will be addressed .