While we are voicing our opinions here, I have to say that I do not agree. The ban on sex is currently so the server doesn't have legal trouble over exposing youth to things of a sexual nature, and so the server didn't turn into a cyber sex haven.
The use of drugs has neither of these problems. The server hasn't been a drug user haven, dispite years of open use, and it is not illegal for minors to see use like this.
If we start 'trimming the immorality' then the server will be no different to a faerun server. If were going to make one damaging act 'fade to black' then we might as well make the murder and torture and violence 'fade to black' as well.
Never underestimate a stupid person with a lawyer. Especially in these times. This is one of those things of cover you own butt. Unfortunately there is no way to bar children from entering the server and all you need is one parent that has a lawyer to give you enough grief. It is a problem that this community doesn't need.
I agree with you that details in drug abuse can add to a more deeper horror immersion and I can imagine a majority of the server as well; however, with that stated all you need is that one person and this entire project can go under.
I can see a good DM event where PCs have to solve a drug addiction and trafficking problem. But still need to have some what of a tread carefully approach. It is best to say X character [uses this drug] instead of the details that portray in using the drug like the preparation, needles, ect.
The reason for this is that drug addiction is very common everyday real world problem that many people face and some parents or relatives are afraid that their love ones will fall into that trap. Where as murder and torturing, even though they do exists, are not as apparent. This is a horror setting so there will be things that question and challenge morality and the meaning of sanity. Stuff that you can do at home with your buddies in the way of details may not apply to this server, I can imagine the staff is walking a thin line with some things be cause they want to immersion of the suspense and horror, but they don't want the whiplash of the nut and his lawyer.
Just have to be careful of that one lunatic parent that wants to blame their kid's problems on someone. It is best not to be us.