Even if the plant did sense your emotions, are your emotions of smoking weed negative? I think not, seems like most of those are good vibes that you would be sending out, hoping the plant to grow bigger and all that jazz... So seems to me that the esp part would have nothing to do with it.

Unless instead of thinking of smoking and getting high, basicly being happy, you perhaps were thinking of setting the plant on fire and as its burning laughing maniacly....Not usualy what goes through my head... but to each their own.