I don't have much of an issue with THAC0 the clown; I get the joke and am not worked up over it at all. But there is an undercurrent of ageism that crops up every once in a while. I'm not talking just about this scenario, but other ones that come up every so often. The term "grognard" used as a pejorative, or complaints how older gamers are all the same and refuse to accept evolutions in the game, or how older gamers are trying to keep younger players from having fun, or all of us lumped into the same category because an older gamer here or there says something really dumb, etc. And by and large, these comments are typically accepted without being called out. At times, it feels like it's the last demographic that it's OK to make fun of.
Which always surprises me a bit, because many times it's by folks who frequently vocally champion how diversity and inclusiveness are important. I really have no interest in arguing "no it's not!" type of responses. These are just observations I and others have made. I'm not all up in arms about it, or throwing a fit, or any of that. I recall being younger and getting upset about how the older generation was never taking us seriously or dismissing us, so I get it. But it doesn't make it right, to stereotype others just because of personal experiences with a few. That's not OK with any demographic (as a veteran, I deal with this a lot with my veteran friends who were overseas, and their views on Muslims because of how they personally were treated in their personal experiences, and how that doesn't make it OK to make generalizations based on those experiences).
I suppose I'd like for us as a community to try to be more aware of it. Just replace the age with any other protected class and see if it sounds OK to post with that replacement. If not, probably not OK to say it in regards to age.
That's all.