3 recent encounters (one in a newspaper, one a parent of a child in ds's class, and one in a film) - all seemed to imply, it's not reasonable to say to your children that they shouldn't take ANY illegal drugs.
TBH I would be terrified of the illegality anyway, which is why I've never taken any myself (as well as being titanically square throughout my life). There is also a bloody good reason why ds should steer clear, as both his father and his aunt have major, long term headsplattering mental health problems.
Could anyone, perhaps especially those with teenage boys, reassure me that it is possible to talk to them on the basis that, even though a massive proportion of their peers will probably try drugs at some time, there ARE good reasons not to? I just feel very scared at the moment.