Professor James Duane explains in shocking detail why, in the USA, everybody should remember to exercise their right under the Fifth Amendment to remain silent. (htp: Obnoxio The Clown, referring to Philip Thomas' post)
You have the right to remain silent. Anything you say can and will be used against you in a court of law. You have the right to speak to an attorney and to have an attorney present during any questioning. If you cannot afford a lawyer, one will be provided for you at government expense."
How about here in Britain?
"Free legal advice is worth what you pay for it." Having said that, here is a site purporting to give advice to activists being questioned by police in the UK.
How many laws are on the Statute Books in the United Kingdom? Is there anybody in the country of legal age who could not be accused of having broken one of them? Do we not have too much law?