Q. Is there an issur to offer a taste (of marijuana liquid tincture ”“ see question above), to someone else? Is there a Chilul Hashem issue when using it in public?

A. As mentioned in the previous question, Horav Shlomo Miller’s opinion is that the use of recreational drugs should be avoided. Therefore, it would be forbidden to offer it to anyone else who does not require it for medical reasons. The prohibition is similar to feeding someone non kosher food, and it involves “lifnei iver” (placing a stumbling block in front of the blind) or “mesayea l’dvar avera” (helping someone transgress a prohibition).
When done in public it would incur Chilul Hashem also.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a