Careful - having an opinion on the differing costs/benefits of various illegal drugs based on past experience does not neatly equate into current drug use. Furthermore, past drug use prior to partenhood does not neatly equate into bad parenting, whereas driving around with a half rack of beer strapped down with a seat belt while the toddler is unrestrained in the back seat does.
Does experience with recreational drug use automatically make someone an affirmative proponent of recreational drug use? I don't think so. Indeed, it has often had the exact opposite effect. Like most things in life, recreational drug use(including the liquor) can be a blessing or a curse - and most likely offers a bit of both.
Edited to add - furthermore, judging others for the risks associated with their personal choices (including potential impacts on children and family) on a website for people devoted to some fucking dangerous activities seems a bit odd.