By that rule we could not sell many household cleaners, bug sprays, weed killers, etc. And any drug could be made to pass this test by being sufficiently diluted.
My ethics would steer me towards preventing harms.I have no authority,but I do have a desire to use common sense and reasonable prudence around deadly poisons.
How can you enforce YOUR "common sense and reasonable prudence" on others with no authority?
"Natural law".Once again,who defines this?
Already defined; see immediately below.
"As a reasoning free-willed being, an adult human is capable of formulating and pursuing his own ends, so nobody else has the right to dictate his ends to him."
Only problem with this is many adults do not reason well.Their reasoning processes end up leading them to infringe upon the rights of others.
Neither making, distributing, selling, buying, nor using drugs infringes upon the rights of others.