I understand these powers are often used to intimidate and pressure minorities on their way out of the UK too. For example, a traveller will be questioned abou

I understand these powers are often used to intimidate and pressure minorities on their way out of the UK too. For example, a traveller will be questioned about his family in Pakistan. It's a criminal offence not to answer. However the threat that is used is that the person will be detained for long enough that they miss their flight. They'll need to rebook it at 4X the cost with no guarantee they'll be allowed to board the next flight either. These powers are being abused to coerce and haven't been properly tested in court. The UK should restore the right to silence.