Wikipedia:Articles for deletion/List of General Slocum victims (2nd nomination)
I can only guess (having not been involved in that AfD), that the Va Tech, and even the Titanic list is there because at least some of the individuals involved are notable, and have Wikipedia articles.  Even Columbine has a few articles on individuals.  Admittadly, some of that is sstrictly because those events were heavily covered by the modern news media, while the Slocumb was covered, though individual stories were either not likely as covered, or those stories have been buried by time.  In any event, the only notable people on the Slocumb list are the two survivors.  The list of the dead, tragedy that it was, was not a list of notable people as per 
— User:LonelyBeacon, 16:59, 10 December 2007 (UTC)
Stance: comment
Cited policy: WP:N (Wikipedia:Notability)