Even before you set up the iMessages account you will have a Bonjour Account.
You cannot Delete it.
You can only Untick the "Enable this Account" box (Or Untick the item in the Messages Menu > Accounts) to send it Off line.
IF you have deleted the iMessage Account and don't have an AIM or Jabber account then it will only see Bonjour in the List in Message > Preferences > Accounts
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.2)
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
Couple of iPhones and an iPad
"Limit the Logs to the Bits above Binary Images." No, Seriously