See:

• Wikipedia:Administrators' noticeboard/Archive73#Extreme long-term sockpuppetism (Jan 2007)
• Wikipedia:Administrators' noticeboard/IncidentArchive522#Long-term socks & evasion of accountability (March 2009)
• Wikipedia:Requests for checkuser/Case/Bloomfield (Jan 2007 + Dec 2008)
• Wikipedia:Requests for checkuser/Case/Kidsunited (Dec 2007)
• Wikipedia:Articles for deletion/Tõnu Trubetsky (June 2008)