How would we know? Was it written that what we today call "pot" was illegal 2000 years ago in Judea? If not against the current laws at that time then the consideration of what our Lord did or did not partake of is irrelevant. Wine was banned in parts of the world at that time, yet Jesus drank wine. Do not confuse the laws of men with the laws of God. You are not meant to be the Judge of men.