I think he was alluding to non-injected drug use, like drinking beer or smoking weed.
Of course by the time injecting street drugs into your veins seems like your least-bad option, you're in a pretty desperate place and maybe not someone that kids should be around while you're using.
I thought the post I was replying to was implying that people on drugs are inherently dangerous to be around, so all I was really trying to suggest is that there are a lot of people who appear "respectable" but are hiding a serious drug habit.
it seems that sempron64 meant people who are literally in the act of shooting up. I guess I can understand not wanting a child to see that, although I question whether that's really as bad as we are supposed to think. it can certainly be unsettling to see for the first time, but all it ever suggests to me is that the person has a truly miserable life. I honestly doubt that it's as bad as pervasive images of people drinking, smoking, partying and having a good time. the latter seems a lot more likely to lead an impressionable mind astray.
