What has gone unnoticed in the recent story about the disgraceful burning of a Grenfell Tower effigy on a bonfire in South East London is that this event was almost certainly never intended to be made public. One of the people involved filmed the event on their smartphone and then posted it to what was very likely meant to be a private WhatsApp group. Someone in the private group then forwarded the video onto at least one other person outside of the group and any control over distribution was lost from that point onwards. The video went viral and the fury of the country descended upon them. No sympathy from me on this point. The massive outpouring of public anger that led to their subsequent arrest by the police, was the least that they deserved.
My point in raising this issue is that it highlights one of the dangers of using free tools like WhatsApp for critical communications purposes, which is that WhatsApp groups lack administrator control over what happens to the information that is shared via the application. Any media attachments, such as videos, are downloaded as default to all user devices and can easily be shared outside of the platform. This is a seriously risky business if you are sending anything that you would regard as confidential.