Captain52 is an ex-TV.com and SBC troll, who had a history of acting hateful towards the TV.com staff and members, and being a major ban-dodger. He went by many names, such as NightmareFan17 and RockGoddess18. As of 2011 though, he has been reformed.
After Captain's banning sometime in late 2008, he snuck back onto TV.com as "RockGoddess18", claiming to be a female member. Nobody suspected "her" at first, but in July 2009, a strange event occurred in which Bob_Ball called out Rock_Goddess as being Captain52. He was right. Because of this, RG immediately left the site leaving nothing but a note on "her" bio. RG had created a large variety of different accounts and fooled everyone. "She" even claimed to have siblings and created two accounts to cheat on the Best Episode Ever Contest in the Spongebob forums, the prime reason why Bob_Ball called him out in the first place. This incident led NightmareFan to orchestrate the Forum Attack 2009, which in turn, resulted in the creation of SBC.
A user named DarkWaters78 had joined SBC on September 1, 2010, but he was not who he claimed to be. Late at night, when all of the moderators and administrators were offline, he attacked the forum. He began spamming topics with hate comments about The Spongebob Community and its staff. He also revealed that he was actually NightmareFan_17, a former TV.com member, named Rock Goddess. This startled fellow users BeachBob95, Pakasa43, Deli, Sabrespongebob, and Steel Sponge (who was asleep before DarkWaters spammed). With no moderator or administrator to report him too, DarkWaters was able to spam the site for hours. He was finally banned the next morning on September 26, 2010 by an administrator named ExKizuna. NightmareFan came back later, and said he had changed. But he later deleted his account for an unknown reason.
On July 11th, 2011, he returned as AlienEmperor57 and apologized. He is no longer considered a troll. After a short period of time before the vBulletin move, he disappeared again. However, he returned December 7th, 2011. He left during the latter half of 2012 without explanation as to why he left. He has not been seen since, but his bad days are behind him.