It's one of those odd words which has several meanings, one of which is the name of a d.r.u.g.
The Forum bans all occurences without realizing the context you intended. Sadly, many automated mailers post adverts for these substances in forum messages, that's why it has to be removed.
You can write that word with dots between letters, such Alex says, and no problem. If someone write something bad or ugly, or something against forum rules, admins should delete that contents.