We are just seeing the beginning, I'm afraid. I just flagged a ChatGPT generated answer (the German tagline gave it away), generated by a new user. If you look at their profile, you will see that it has a link to a linktr.ee that contains spam links. Other links in the profile are muddled because of some technical error.
If this becomes automated, we will see tons of new users providing seemingly okay answers. This could flood the first and late answers queue, and if some bot gets past the first post, it could swamp the answers with ChatGPT in the hope to spread spammy and possibly malicious links. Because the answer looks (and possibly is) okay users could be misled. This would undermine the trustworthiness of the forum.
So, yes, I think we should take this issue seriously