His social security number being posted was mainly just a way to prove the person had private information noone else had.
That's some pretty terrible logic then. "Here is a string of numbers no one else has, in order to verify the information." By the virtue of having information no one else has, no one else can verify it.
FYI, the SSN posted for Joshua Zipkin is not his personal SSN. Its the business EIN. A corporate SSN if you will. Its for AMT. Considering it was tied to the bank account it makes sense in this case. I checked it out. Its invalid now as he has folded the business up. But still shows in my sources record.
So yea this was valid information. Having it did not compromise his personal info whatsoever as this was the corporations "SSN".