What do I have to do to get an account / username deleted?

There are a few PROFCHAT team members who I would like removed, one (Fisk's second one) because his name is on there twice [one a dud account he couldn't get to work] the other WalshernUK because he died last year and it quite frankly makes me feel sad whenever I look at the team data

< Beardyphish is the founder of the ProfChat team, the name comes from the Yahoo! chatroom Professors' chat, several of the regulars from there joined the project >