While there are some important exceptions to this principle, such as where the landowner is carrying out
some particularly dangerous activity on the land; there is some unreasonably dangerous area on the land; or the landowner is aware of — and generally tolerates — frequent trespassers (for example, if a landowner knows that children frequently walk through his land as a short - cut from a school bus to their homes), a landowner generally has no duty to minimize the risk of harm to trespassers.
It should of course go without saying that
any particularly dangerous activity, like driving, should still be illegal while high, to protect the smoker from such mistakes.