Personal values aside, PA general hunting regulations say no being under the influence(zero point what?..... I dunnno), and in the section on State Game Lands and shooting ranges further prohibits simple possession. His offer to share suggests his use is more recreational and less medical that he rationalizes.
http://www.pgc.state.pa.us/pgc/lib/p...egulations.pdf
"....Drugs & Alcohol: It is unlawful to hunt wildlife while under the
influence of controlled substances or alcohol....."
"...... Be intoxicated, use or possess alcohol or a controlled substance...."