How private are shared addresses ?

[chaoticbrain]

Do shared addresses really make things completely private ? Or is it just a slight obscuring that can still be traced ?

[sidazhang]

Do shared addresses really make things completely private ? Or is it just a slight obscuring that can still be traced ?

If anything, wouldn't you think that a shared address makes thing less private? The fact that the shared address has to keep track of your account and your account balance.

For example, an exchange might use shared addresses and also have my credit card information