I have one with first transaction back in 2012: 1HZwkjkeaoZfTSaJxDw6aKkxp45agDiEzN
Message: "Oldest i have"
Signature: "HJhVCVulX2Ezm8441dwXgay67ozUB3Zx7ugZ+uIjxGI5ad1+9D7jkFvHIHl+7vCS5w9FCDoyVdzxAj8NVGDSrJE="
That's amazing! I've got the same combination on my luggage!
$ ./bitcoin-cli verifymessage 1HZwkjkeaoZfTSaJxDw6aKkxp45agDiEzN "HEvt5MuLizA33qqIU5RGKY5XLLSmdnf8TpoD3jRtlViQHDgeDmmyTT0owamGdI2tssr30QDy/hcpvt75YK8Ai8I=" "How do you do, fellow kids?"
true
Don't be stupid and go deanonymizing yourself for some silly forum thread posted by someone who not only was faking being a long time user, but for which 2012 was the best he could do.