"Not only that, but in some areas they're chucked at people's windows, through their letterboxes and at passing cars."

By the same logic, we should ban all dogs because a few people leave dog shit lying around (more than a few, as it happens). I don't like the idea of banning things because of abuse by minorities. We don't restrict cars to maximum speeds just because some people speed. We don't ban all gambling or boozing because a minority become addicts. We don't ban food packaging because some people leave litter. Etcetera.