I said that it's common for shorts to post, and you're saying that I'm wrong and that it's not surprising that a short posted in this Tesla thread. Gotcha.
Most Tesla-related threads on HN, no matter what the original article is about, contain some combination of the following:
A stock short posting about why they're shorting Tesla, usually for reasons completely unrelated to the article.
Someone complaining that they live in an apartment and don't have a place to charge.
Someone complaining about the Tesla touchscreen controls being worse than physical controls, generally without indicating that they're aware that Teslas have the usual steering wheel controls.
Animats complaining that Autopilot is misnamed. (I suppose that's what his YouTube url list is about, I guess he missed that part about "don't post video links without explaining what's in them".)
A complaint that Tesla cars are only for rich people.
A complaint that since some places in the developing world don't have a reliable electric grid, that... well, I'm not sure what they're getting at.
A complaint that we can't all switch to electric cars tomorrow, because the Grid isn't big enough.
A complaint that electric cars aren't good because a lot of electricity comes from coal.
A complaint that electric cars aren't good because of the fairly modest environmental damage that comes from lithium mines.
A complaint that Tesla, SpaceX, and Solar City are more tied together than they should be.
A complaint about Elon's reality distortion field.
A complaint that there's a gang downvoting anti-Tesla comments.
A complaint that there's a gang downvoting pro-Tesla comments.
A complaint that all Tesla threads get flagged off of the front page.
A suggestion that we could use car batteries as grid storage.
Complaints that Teslas aren't luxurious enough. (Uh, isn't Tesla's #1 selling point performance?)
I can go on, but, you have probably already noticed that this thread is scoring pretty high against this list. And really, it's pretty boring. Which is probably why this story has been... wait for it... flagged off of the front page.