According to the West Midlands Police, if your child uses Discord, Kali Linux, VirtualBox, VMware or HyperV, Metasploit or TOR, they are a hacker and you should contact you local constabulary and ask them for help putting your child on the right track!
The “National Crime Agency” logo also appears on the poster, but they have made a press release saying that they don’t agree with the poster and they never authorized the use of their logo in conjunction with it.
But it shows how a little knowledge can be a dangerous thing.