I think they did:
> put the blame on the person who does the wrong thing.
> put the blame on the person who does the wrong thing.
Edit: See edit above. The question isn't whom to blame, the question is how to resolve the issue. Blaming people doesn't generally resolve an issue, but enforcing it or putting in place mechanisms for preventing it or some other tangible action might.
As far as flower-trampling, just shrug and wait for the fad to pass. It's not a big deal.
Perhaps more permanent solution to the problem is in order such as fencing around the flowers getting trampled. End the drug war if you want to save money elsewhere for this.