NEVER trust anyone with your SSN
years ago someone got a hold of my EIN and found out they tried to apply for credit cards and used my info for their affiliate program with CJ.com. Took 5 minutes to settle with the IRS and it was fixed.
the state of California on the other hand thinks I owe them some $4,700 in unpaid taxes but they just wont give it up. Point being, if it was my SSN I would be fucked