LOS ANGELES — To be fair, it's not a very good trailer.

Also to be fair, the reason behind the avalanche of thumbs-downs probably has little to do with its quality, and a lot to do with trolling.

But the fact remains: the trailer for Sony's all-female Ghostbusters reboot is the most-disliked movie trailer in YouTube history. By a lot.

Since its March 3 release, the Ghostbusters trailer has climbed to No. 23 on YouTube's "most-disliked" list with nearly 508,000 thumbs-downs, roughly one down-vote for every 56 of its 28 million views.

And the thumbs-ups are trailing badly at 204,000.

Could the Sony blockbuster comedy be in trouble? Human sacrifice? Dogs and cats living together? Mass hysteria!?

That may be overstating things, because a good chunk of that down-voting was surely goosed by trolls who are upset — or in many cases, want decent people to think they are upset to provoke outrage — over the fact that this Ghostbusters was rebooted and recast with Melissa McCarthy, Kristen Wiig, Kate McKinnon and Leslie Jones.

Whatever the reason, Ghostbusters now has the dubious distinction of sitting between Justin Bieber's "What Do You Mean" and Meghan Trainor's "All About that Bass" in the red column. In fact, just about all of the most-disliked list is music videos, including No. 1, Bieber's star-making Baby. Which is understandable.

The closest movie-related item: a Disney "sing-along" version of "Let it Go" from Frozen, No. 52 with 296,000 dislikes. Also understandable.

We know for a fact that at least one of those Ghostbusters dislikes was motivated solely by the fact that the trailer is terrible. Because it is.

Whether it reflects the film itself, we'll find out July 15.

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H/T ScreenCrush