Wikipedia:Articles for deletion/List of common emoticons
Plenty of sources for this notable expression of Internet culture.  See any random "how to use the Internet" style book for a start.  Reasonable subject for a list.  If it is currently unsourced, the solution is to add sources, not to delete it, per 
— User:JulesH, 13:14, 30 January 2009 (UTC)
Stance: keep
Cited policy: WP:DELETION (Wikipedia:Deletion policy)