Well, same can be said about watching television, playing games or staring at your phone.

Now, if there is no adverse health issue other than making you a little dumber, shouldn't we also ban a host of other habits that cause just a bit of harm to you? What about eating sweets that may give you a bit of pleasure but are also unhealthy if ingested regularly? What about driving car to cinema when you could watch the movie in safety of your home without causing pollution or risking getting your kids in an accident?

Or maybe, just maybe, the freedom is value in itself and we should allow people to make decisions even if they are not optimal for themselves and for others who may have to chip in to pay for somebody elses mistakes?