I thought you were the one who wanted to "help the poor" when really most of the people engaging in the "sins" that you'd tax are lower-middle class. http://www.ncbi.nlm.nih.gov/pubmed/18615935 Source ^
No, I mean people would do what they always do, leech off unsecured wifi. Right now, I got three neighbors I can pirate a wifi signal from. Or backwire a phone to be a wifi station.
And I mean his comment was most likely a sarcastic response to your suggestion of legalizing and taxing a harmful drug.
True, but I think the only reason why they're still around is because they were legalized before we realized how dangerous they were, and people would be really pissed if they were banned now.
They did try to ban alcohol, but all it did was to shift control of the substance to other people.