Oh yeah this is exactly how my group chats went. We still can post some good (in our context) memes and have fun, but not like an avalanche of poorly filtered slop. A joke for a group can still be crafted via an LLM when used judiciously and as intentionally as part of the bit. But by judicious it's important that the human is the one doing the sending and in the right moment, and so the human is still the one communicating.

When WhatsApp originally inserted their AI bot in the chats, it got very annoying very quickly and we agreed to all never invoke it again. It's just a generative spam machine without the curation.