Would an old-style Republican have favored the ever-growing encroachments of liberties necessary to wage the War On Politically-Incorrect Drugs?
I would suggest that a proper old-style Republican would have supported having some things be illegal, but enforce the laws against them only to the extent possible in a free society. If someone is openly using or selling drugs in such a fashion as to draw complaints, prosecute. But if someone is doing so in such a fashion that nobody is bothered, leave that person alone. The job of police should be to respond to complaints--not to track down every single lawbreaker.