If you know is tested by evidence: so did you express knowledge it wasn’t authorised in a tweet, for example. Were there terms and conditions? Did you say you knew on TV, etc.
You can either be reckless as to whether your actions will complete the offence, or intend to do it.
The actions apply to any computer, program, or data.
Impairing operation of a computer.
Preventing or hindering access to programs or data.
Impairing a program or the reliability of its data.
Enabling any of these three things.
So creating DDoS and false petition entries, for example, are obviously included.
Also, where it talks about impairing, preventing or hindering something, this includes temporarily.
So there’s no real escape from this offence.
With computer misuse having the capacity to affect every aspect of our economy, personal lives, and democracy, this is an important remedy to be aware of and a deterrent to all.