I believe I just deleted the first secretly ChatGPT-generated comment on the forum for an OSS project I maintain. It was shaped like an answer, but didn't actually answer the question. Great grammar, sounded authoritative. But, wrong. The internet is absolutely going to become gray goo, and it's going to happen so fast.
@swelljoe If you are able to (and haven't done so already) you can always go to ChatGPT and ask "Did you write this? <Suspected text>". It is usually pretty good to give you a yes/no response.