Howevern in practice that is both annoying and won't do much of anything to protect you from chargebacks, unless you have some way to prove later that the card

Howevern in practice that is both annoying and won't do much of anything to protect you from chargebacks, unless you have some way to prove later that the card was signed. The signature area on my card has worn off, and I have re-signed it several times including with permanent marker, but my signature won't stick. Any retailers giving me hassle about it annoy me for no good reason and are less likely to receive my business in the future.