Depends on what you mean by "works". If you want it to have any effect whatsoever, you have to follow through and actually turn off the game. And you'll have to do so until the lesson sinks in. And you'll have to deal with the kids that are crying and idle in the mean time. And they'll probably resent you for that rule because they aren't able to identify with it.
None of the above is a bad thing or an insurmountable obstacle, but there's nothing seriously wrong with making the computer take the blame either. In my opinion, it ends up teaching the kids to be considerate to others (even if it's just a computer), with less suffering all around. YMMV, etc.
None of the above is a bad thing or an insurmountable obstacle, but there's nothing seriously wrong with making the computer take the blame either. In my opinion, it ends up teaching the kids to be considerate to others (even if it's just a computer), with less suffering all around. YMMV, etc.