I've had one entertaining experience at a conference of having my opinion be partially dismissed in-person due to my age - only to have a guy bring up what this

I've had one entertaining experience at a conference of having my opinion be partially dismissed in-person due to my age - only to have a guy bring up what this "Adrian Howard" dude said on a mailing list to back up my old-dude opinion (I hadn't introduced myself at this point). I guess on the internet nobody knows you're an old dog