Law Breakers
This blunt ban is meaningless to the residents of Philadelphia who are determined to continue feeling their tobacco and drug habits. They aren't going to stop using simply because a silly law has been passed. They'll still get their products, and the only difference will be is that it will now be in an illegal manner.

The truth of the matter is that the likelihood of them opting to buy more expensive products is very low. For Philadelphia, this means that the overcrowded prisons will become even more overcrowded and that the stressed city budget will incur even more debt because more police officers will have to be hired to enforce the new law as well as existing ones.