My kids have a new friend. If you have teenagers, chances are yours do, too. And it is a friend that, by its own admission, may offer ‘biased, incorrect, harmful, or misleading content’. In other words, not a friend at all.

The first I heard of this being was when I logged onto Snapchat, a generally mystifying app that I, as a grown man, use solely to contact my children, who use it as their main tool of communication.