Asking for a SS card for ID is strictlty illegal.
We has instant call in backgroung checks in Oregon when buying a firearm, even when buying a handgun on the form you fill out that they use for the call in you put your drivers license number as ID it states SS number optional.I always put mine down as it speeds the process but it is strictly voluntary.

I would look up the wording of the law and give the next little snip hell that asks for it.

Radio Shack used to demand your name and address (so you were on their catalog list)when you made a purchase, after a few times I started refusing to give it to them and would stand there going back and forth with the clerk untill they called the manager,he would always renig.

We are slowly perhaps not so slowly giving up our rights in our country. My guess is that history will revel as it has in the Kennedy Assination that there is more than a good case to make that giving the goverment more and more power is not a cowincedense.........

William Rogers.......