I use the Privacy Control Options to list credit cards, social security numbers, passwords, etc. so a web site does not transmit any of this data in the clear. It is a great option to protect identity. I just have one complaint / suggestion for improvement.
When a web site tries to transmit prohibited data - the Private Information Alert - High Risk appears multiple times. Each time, I have to press 'OK' to prohibit transmission. Sometimes I have to press OK on a web page 50 to 100 times! There should be an option to prohibit the transmission for all occurrences on the current web page!