No
Doing that to titles is explicitly against the HN guidelines and eventually will cause an account to lose submission privileges.
https://en.wikipedia.org/wiki/Betteridge%27s_law_of_headline...
;)
So in other words, the probability is not Zero. Meaning it is very much worth considering and this article is legit.
That same probability applies to the light sail.
On the other hand, we have essentially no knowledge about what can possibly be flying around out there and thus your claim that it is extremely unlikely to be an artificial object is not based on anything but your own conviction that this is the case.
Probability allows you to say something with confidence if you have information to work out the probability. If you have no information then you have no probability.
I think that our knowledge of the universe does allow me to conclude with some degree of certitude that it is highly unlikely to find a whale on an extra-solar trajectory.
On the other hand, we know nothing about the sort of objects that could exist out there and about the possibility of alien civilisations.
I am not saying that it is likely or unlikely to be a light sail because the fact is that we don't know enough to assign a likelihood. That's as unbiased as can be.
I'm having trouble finding it at the moment, but somewhere out there is a pretty good article that points out that even though more people are now carrying cameras than ever before, UFO sightings have basically fallen off a cliff. They rose with the advent of jet aircraft and the space age, and then fell away in the era of drones. (The ones that I found in search results weren't the one I was thinking of.)
"Lightsail" is being floated as a possible explanation for this because we've recently imagined that technology. A few decades earlier, and nobody would imagine it as an explanation; a few decades later, and we'll have some other favorite new possible explanation that we can't imagine now.
The article wasn't terrible, though.
Or to put it another way, humans conceptualize, observe and measure based on what they currently know and the tools they have.
My point again is we all to often fill the vacuum of what we don't know with 'the extent of our knowledge and experience is the extent of the entire universe'.
We have no idea about what we don't know...
Note that the title on that article is actually "‘Oumuamua, Thin Films and Lightsails". I suppose it might have been different when submitter submitted it, but that seems unlikely.