Morning glories - all varieties- are a passion of mine and I myself was wondering if they were harmful - the flowers.... the only part of the MG that acts as a hallucinogen is the seed of the original grandpa ott (original blue). However those that are comercially available are treated and therefore null. If however like myself you have heirloom nontreateted variety - according to my son a great deal of seed would have to be processed in order to extract the hallucinogenic properties. So I am planting the varied colors along the fence line. They're not edible like other flowers so the distaste should deter them. ( i have tasted them myself) But they sure like my roses. I didnt even get them in the ground / potted b4 they went after those!