Put me on your ignore list if you will, I could care less.
Very well, then. The proper treatment for a stalker:
This message is hidden because Old Fella is on your ignore list.
Hmmm, looks like we have an agitated guppy....
Hardly. That particular poster can't let go, and brings the same obsession to thread after thread, to private messages, and into irrelevant conversations. It's absolutely ridiculous. He missed the point entirely in the original thread, and can't seem to let it go. Moreover, he was wrong to begin with. Producing type certificate data sheets and documentation to establish and prove that fact still didn't do it for him, and more than enough time has been wasted responding to him in the original thread.
I'm certainly not going to validate him by doing it here, there, or elsewhere. He's had his five minutes of fame, and regardless of whatever level of senility drives his passion, I am not obligated to help fuel it every time he pops up with his one-track drive. If he wants to keep it going let him do it by himself. For the present, he's on the ignore list, and I find that an acceptable solution until he quits blathering, shuts up, and finally turns his attention back to the great grandkids, or whatever may float his boat.