I was going to say the same. They did follow up with “However, we would appreciate your sense of humor in chat if you want to drop by!” but the bolded comment above significantly outweighs this.

At least this earlier comment was deemed relevant and not too jokey:

> Even more fun, Apollo 14 didn't use their grenades, and they are still on the lunar surface.

At least here it's jokes, sometimes they ask people to put valuable comments inside the chat, which is of course not publicly accessible so it's lost