Writing "see ID" on the back isn't a good practice nor recommended by any credit card company. The space for a signature on the back is for you to sign that you agree with the credit card company that you authorize the purchases and will pay back debts incurred by the card, not to allow the merchant to use as a reference for your signature. Technically if you don't sign it (e.g., if you write "see ID"), your card isn't valid and the merchant could refuse to accept it at all, with or without ID.
Even if comparing signatures was the purpose of that space, as a practical matter either it would be useless. Our signatures on those electronic things or on receipts generally look nothing like whatever is scribbled on our cards. No one ever compares signatures to what's on the card. They also don't read whatever you have written instead of a signature.
My wife has always written "see ID" on her cards and doesn't care that it's wrong on every level. Clerks never ask for her ID. In fact, I believe they are not supposed to.