Yes, this. Here's Loeb 2 years ago on Oumuamua - was it Aliens?

https://www.scientificamerican.com/article/astronomer-avi-lo...

https://earthsky.org/space/oumuamua-a-comet-avi-loeb-respond...

Here's Loeb on space dust - was it Aliens?

https://www.livescience.com/space/extraterrestrial-life/alie...

He's doing what he usually does. It's fun to think about, but not to be taken too seriously or regarded as anything unique.