The drug trade and all it's problems, stops -with no government intervention. (think prohibition)
Period.
(big phrama is still a problem, but in the realm of illicit substances)
Other people in my head, and deciding where I go.....an orwellian wet dream..
not exactly.
you're conflating virtual/augmented reality (much more complex)
with pleasure stimulation. (think induced orgasm..of indefinite length)
the former is theoretical
the latter has been possible for fifty years.
(brain surgery is a bit of a deterrent..but it's possible)