Why so much censorship?

There is supposed to be a right about freedom of speech, but if some one mentions a subject about drugs it is immediately deleted? And yet, there is a section for alcohol which is a drug by the way. Most other drugs are less harmful. Since it's legal it isn't censored. You may say that it is not appropriate to talk about, but really, if you start censoring things the line of free speech starts to get blurred. In reality you have no rights. It's the troof. /rant