You can predefine, disable or remove several options on the UserPreferences page using the following parameters in wikiconfig.py like shown on HelpOnConfiguration:

• user_checkbox_defaults
• user_checkbox_disable
• user_checkbox_fields
• user_checkbox_remove
• user_form_defaults
• user_form_disable
• user_form_fields
• user_form_remove

The possible values are found in multiconfig.py:

user_checkbox_remove = ['edit_on_doubleclick', 'show_nonexist_qm', 'show_toolbar', 'show_topbottom', 'show_fancy_diff', 'wikiname_add_spaces', 'remember_me', 'disabled',]

user_form_remove = ['password', 'password2', 'css_url', 'logout', 'create', 'account_sendmail', 'aliasname',]