What do you think should be done? What methods are there, besides harsh economic sanctions, to control entities which break regulations and detriment free society? Clearly something needs to happen, something with impact. Pray to the invisible hand?
The author, as I see it based entirely on this one article, likely wasn't trying to "hurt their business," unless (lol) their business is unhealthy addiction. Building on your example, imagine your store was of the liquor variety, and someone placed a flier for the local AA meeting on the bulletin board. I doubt you would remove it.
This same old comment seems to show up in these threads like clockwork. Surely no one in this world is truly obligated to do anything at all, but kicking out users based on vague reasoning detriments their value as a social network.