As one can now be arrested for the offence of "being equipped for locking on", the only difference between arresting protestors today, and arresting me every time I go out on my bike, carrying two locks, is whether the police officers around at the time have formed a negative view about my intent.
@neil
IIRC, protestors linking arms is also referred to as "locking on" in court - does that mean people who have limbs are suspect?