I would say nothing has changed in the long run. As new technology has appeared that may make it easier to avoid the interest of law enforcement, so has the tec

I would say nothing has changed in the long run. As new technology has appeared that may make it easier to avoid the interest of law enforcement, so has the technology that law enforcement uses to counter the avoidance. If you were a part of a criminal enterprise twenty years ago you developed your own film and never use the randomly chosen pay phone more than once. I would even go as far to say that their jobs of collecting usable evidence is much easier today than it was twenty years ago.