To Sign or Not To Sign

There seems to be varying opinions out there about whether or not people should sign the back of their credit cards. In either case, it is argued that signing the back of the credit card is a theft deterrent. Do you sign yours, leave it blank, or write "see ID"? In any case, what's your reasoning?

Never really thought about that, I don't sign the back though. No real reason, I just don't is it for security or something?

I sign the back of all my credit cards, I read that if someone stole your card they can sign the back the their signature would just match all the receipts.

Signing at the back of your credit card is a security measure and this is applicable to over the counter transactions. This is a counter checking measure mechanism for offline merchants to avoid possible fraudulent offline credit card transactions.

I always sign, it costs me nothing, takes a few seconds and can do no harm.

[Jeanie]

I Sign Plus Put Ask 4 Id Pls On Them. I Do That Because In Case Someone Gets My Cc You Have To Look Like Me On My Id, Lol But, Not Too Many Ppl Will Ask If They See The Signature And If You Look, The Cc Is Not Valid Unless Signed