Hand every tourist a brochure about the Do's and Dont's. Aka, like Singapore prints warnings (DEATH TO DRUG TRAFFICKERS) on their landing cards.
If laws and rules are disrespected fine the sweet bejeezus out of those assholes (like in the thousands of $ range) and ban them from the country (or ideally, from the Schengen room) for 5 to 10 years.
Hand every tourist a brochure about the Do's and Dont's. Aka, like Singapore prints warnings (DEATH TO DRUG TRAFFICKERS) on their landing cards.
If laws and rules are disrespected fine the sweet bejeezus out of those assholes (like in the thousands of $ range) and ban them from the country (or ideally, from the Schengen room) for 5 to 10 years.
The problem will solve itself in short time.