Incredibly, Slammers believe that opinions, when collective, are facts. They garner these collective opinions by socializing with other Slammers. Voila, Slam Club. Slammers earnestly believe that by slamming third parties to you, they are helping you. In fact they are precluding you from choosing for yourself of whom or what you will approve.
Slammers slam other people behind their backs.
This includes each other. The Slam Club is predicated on the target not being present to defend him or herself. This crucial difference distinguishes Slammers from Normal People with worthy grievances against another person. A Normal Person confronts a wrongdoer or a mistakemaker directly, and gives them a chance to explain their actions and to apologize. Slammers want neither an explanation nor an apology, preferring to perpetuate the myth that the slammed is intrinsically unworthy.