As you may be aware, over the last week Stack Overflow has been plagued by some users' feeding questions posted there into the chat-bot 'ChatGPT' then copy-&-pasting its responses into purported answers. This practice has now been prohibited on S.O. (Temporary policy: ChatGPT is banned), & may yet be prohibited network-wide (Ban ChatGPT network-wide).
After reviewing answers since 30th Nov. (when ChatGPT was launched), I'm confident that there's been only a single case of this on Cross Validated up till now. So no cause for alarm: but if an answer does raise your suspicions please flag it as "in need of moderator attention"—we'd like to know even in the unlikely event that it's a useful one. (And of course be advised that it's probably not worth your while to put much effort into engaging with the answerer.)
There've been three more now (7th Dec.)—from the same account, in quick succession. I note that four people have wasted their time writing comments asking for clarification or challenging the "answers".
As of 12th Dec. we've still had a total of only twelve or thirteen, from five accounts. It doesn't seem we're going to suffer as S.O. has, though I note that ChatGPT has been at operating at full capacity for the last few days & is no longer accepting new accounts.