The UK has decided to spend resources on policing kids aged 13-17 on whether they are posting politically incorrect material online. Throughout this campaign, they hope to instill fear in the younger generation that what you retweet or like might get you convicted under the Terrorism Act.
According to Action Counters Terrorism:
Terrorist-related offending can include:
displaying the signs, symbols and slogans of terrorist groups
creating extremist content that celebrates terrorists or terrorist groups
sharing extremist content that celebrates terrorists or terrorist groups
encouraging other people to commit terrorist crimes
threatening acts of violence for terrorist causes online.