I'm not sure the contact-high situation is analogous and I don't quite understand the connection you're trying to make there, so I'm going to focus on the toys.
I agree that violent-themed toys are a cause for concern because they can fuel aggressive behavior and attitudes, and normalize the destructiveness of war. I think we are numbed to the horrors of war because 1) we are removed from the consequences of such violence, and 2) we are bombarded with violent imagery so much we are inured to it. The earlier someone is exposed to a certain kind of behavior, the more "normal" it can seem to them (there are innumerable examples of this). The world is a violent place where violent things happen often; children are exposed to violent imagery and conditioned by it, and then incorporate violent themes into their play. The toy industry interprets this as demand, and offers toys that cater to these violent tendencies. Then someone like us sees the toys and it's easy for us to think that the toy industry is to blame for making toys that encourage violence; it's a chicken-and-egg argument.
In truth, it's all a cycle of interrelated cause and effect. The industry is reacting to what they perceive as demand, and demand is directed by a number of factors that are beyond their control. Toy companies are a part of the cycle, but I think that making a new law that further dictates what they can make will have little impact on the underlying issues. A child can (and will) still pick up a stick and pretend it's a sword or a gun. After all the campaigning and lobbying for new toy legislation, if kids are still pretending to stab and kill each other, was the legislation successful? The intention was noble, but was it a worthwhile endeavor?
Whenever we find ourselves saying "there ought to be a law..." we should probably take a step back and look at the larger picture; unfortunately, reality is far more complicated than anything that can be dictated by the laws of man. It's by expanding our understanding of the situation can we find ways to motivate, rather than dictate changes in people's behaviors. So yes, change is necessary to break the cause and effect of violence, but how to effect change?
The answer, in my opinion, is redirection.
The target demographic for this change is the parents and adults whom children look up to, and their ability to influence those kids. I'll share an example that just came to mind: I was visiting a Waldorf-inspired preschool once taking photos for promotional materials, and a kid picked up a stick and started pretending it was a gun. Waldorf schools don't have representative toys, so even in an environment free of toy guns, this kind of play can creep in--one reason I don't think regulation alone will accomplish your goal. The teacher immediately noticed this and gently suggested they interpret the stick in a different way, and the kid redirected his imagination and the stick became something else completely. It was amazing how elastic the child's interpretation was, and the the teacher subtly turned them from a path of normalized violence to a more positive interpretation. This kind of approach is a simple, repeatable tool that can be taught to parents to help influence their children without dictating to them how they can and cannot play. Engage the parents, motivate them to
want to steer their children from violent play (I can imagine a compelling ad campaign that juxtaposes a child playing war games and actual images of violence), then give them easy methods to use and habituate to.
I'm currently reading an excellent book about enacting change called
Switch, and I highly encourage you to take a look if you can (wow, I even found a PDF version of the book
here, so no excuses!). The book is quite insightful and full of examples of difficult situations that were able to improve with the right approaches. It's broken down in an interesting way as well; read the first chapter to understand the metaphor of the Rider and the Elephant, and I doubt you'll stop there.
I. Direct the Rider:
- Find the bright spots
- Script the critical moves
- Point to the destination
II. Motivate the Elephant:
- Find the feeling
- Shrink the Change;
- Grow your people
III. Shape the Path:
- Tweak the environment
- Build habits
- Rally the herd