Simplify the following text for a Grade 7 native English-speaking person.
Original: When one civic group began to publish Klan membership lists , the number of members quickly declined . The National Association for the Advancement of Colored People carried on public education campaigns in order to inform people about Klan activities and lobbied against Klan abuses in Congress .
Simplified: The methods of acting against people were often the same : the Klan members tried to frighten the people that the Klan wanted to go out of town .