How to Disable Autocomplete in Apple Safari

Click the 'Safari' menu, and scroll to 'Preferences.'
Select 'AutoFill.'
Deselect the check boxes next to 'Using info from my Address Book card,' 'User names and passwords' and 'Other forms.' This will disable all the sources AutoFill uses to complete forms, so Safari will not have any data to put into a form automatically.
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How to Block Email Addresses in AOL

Browse to AOL.com and log into your webmail account.
Click 'Settings' on the top portion of the screen.
Click 'Spam Controls.'
Click the menu next to 'Spam Filters by Address,' and click 'Custom.'
Click the radio button labeled 'Block mail from,' then enter an email address in the box immediately below it. Click the green plus sign icon to add the filter. Add as many email addresses as you like, clicking the plus sign after each one.
Click 'Save' to make your new filter settings permanent.
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