Should Social Security Cards be a photo ID?

Sounds like a reasonable idea to me. I just heard it suggested on Meet The Press during an immigration discussion and the Arizona law.

What are the negatives and the positives?

Personally, I never carry my SS card, it is never in my wallet, I don’t even use it when I get a job. Identity theft has always caused me to never have it on me. Previously, I was always in favor of a federal ID though, whether it be a federal age of majority or federal drivers license. But, I can see that with concerns for illegal immigration a photo social security card might make sense.