If you're in, you have experienced people you love and respect being declared SP (an enemy of Scientology). I know, as I'm now one of them, and I was a member in great standing for 30 years.
For those unfamiliar with this term, SP stands for "Suppressive Person." Scientology founder L. Ron Hubbard was always fighting hidden "enemies" and once he decided they were "bad" (usually because they thought differently than he did, or disagreed with him or his policies) he would literally "declare" them SP. A declaration was officially written by top executives, put on a goldenrod-colored piece of paper and distributed throughout Scientology.
On this "SP declare" would be a list of the "crimes" this person had supposedly committed. Once you are declared SP, just to give you an idea of the extent of this, NO ONE within Scientology can or will speak with you, except for one person, the International Justice Chief. (Once I was declared, even this person refused to speak with me, which violates their own policy).