I really despise the keychain "feature" in OS X. I do not want my computer or my browser to know my passwords.
How do I stop keychain from being active completely?
Everything I've looked at discusses how to change your password or make it more accessible, but I want to disable this altogether.
You can remove all passwords stored in Keychain via menu File -> Delete Keychain "login". This will create a 'fresh' keychain; you only have to remember not to store any new passwords in it when the system asks for it.
For Safari, open its Preferences and go to the Passwords tab. Uncheck the 'AutoFill user names and passwords' option: