It is sometimes hard to tell just who or how many people a group really represents.Many groups have titles that suggest that they have thousands or even millions of dedicated members.Many groups do not in fact represent the views of all of the people for whom they claim to speak.Very often in and out of politics,an organization is dominated by an active minority who conduct the group's affairs and make its policy decisions.Some groups use tactics that,if they were to become widespread, would undermine the hole policial system.These practices include bribery,an other heavy-handed uses of money,overt threats of revenge