In crime dramas, when someone is arrested, he is read his Miranda Rights, "You have the right to remain silent," "You have the right to an attorney," etc. It seems, however, that all good, law-abiding citizens are willing to waive their rights and talk to the police without any qualms at all. But as soon as someone demands a lawyer, or refuses to talk without one, you know instantly that he is a sleazeball. Maybe not the one the police are actually seeking, but he is definitely someone of ill repute. This is a subtrope of Artistic License Law. See also Be as Unhelpful as Possible.