On the morning of July 30, if you were searching YouTube for Tom Hanks or Steven Spielberg -- wanting to learn a little about Hollywood royalty, or just to find that funny clip from Big you loved years ago -- you would have been in for an unpleasant surprise.

As NBC’s Ben Collins first pointed out on Twitter, the search results for Hanks and Spielberg were dominated by conspiracy theories, alleging that both Spielberg and Hanks -- along with other celebrities including like Seth Green and Macaulay Culkin -- were pedophiles and, a part of a nefarious ring of Hollywood child predators that online conspiracy theorists had dubbedentitled #Pedowood.

The videos that popped up upon searching for Spielberg and Hanks were low-quality-fi, rambling, close-up shots, several made  by a man named Isaac Kappy, a minor actor who has spent the last week posting video-recorded rants on YouTube with titles like “Famous Actor Exposes Hollywood Pedophiles! Steven Spielberg, Tom Hanks And More! #Pizzagate.” Thanks to rapid dissemination on message boards Reddit and 4chan, the videos garnered hundreds of thousands of views and shot up in the YouTube rankings, eclipsing interviews and movie clips featuring the stars.

The hashtag #Pizzagate included in the title of Kappy’s video is a reference to the Pizzagate conspiracy theory, which posits that prominent Democrats are running a child sex-slave ring out of a Washington, D.C., pizza restaurant. The conspiracy theory culminated in one adherent firing an automatic weapon inside the pizzeria. According to BuzzFeed, the newfound allegations of pedophilia against Hanks can be traced back to Twitter user Sarah Ruth Ashcraft, a prominent member of the QAnon conspiracy theory community, which grew out of Pizzagate and has mushroomed into baroque complexity. The ever-growing QAnon conspiracy theory, which is flexible enough to accommodate a wide range of events, asserts that a broad array of prominent figures with liberal leanings are part of an international child sex-slavery operation. The theory has hundreds of thousands of devotees on Reddit, YouTube, Facebook, and Twitter and countless dedicated blogs. (Roseanne Barr is a prominent believer in QAnon.) People are even showing up to Trump rallies dressed in “Q” apparel.

People lining up for the Trump rally in Tampa today. A lot of the chan anons might treat Q-Anon like a LARP, but by all appearances there are plenty of people who take it seriously irl. pic.twitter.com/uys7kmnAs1

— Travis View (@travis_view) July 31, 2018

Ashcraft, who frequently uses the hashtag #QAnon, has over 45,000 Twitter followers and uses her page to decry “Ritual Abuse, Mind Control, Child Porn, and Sex Trafficking,” focusing her ire on the alleged wrongdoings of celebrities like Hanks. (Since Ashcraft’s accusations against Hanks made headlines, and after BuzzFeed pointedly reached out to the social media company, her Twitter page has been restricted.)

After NBC’s Collins reached out to YouTube for comment, some of the conspiracy-theory videos dropped in search rankings for the celebrities. A spokesperson for YouTube told Buzzfeed, “We’re continuously working to better surface and promote news and authoritative sources to make the best possible information available to YouTube viewers.”

The hyperconnectivity of social media can make constructive messages spread fast -- and destructive falsehoods spread even faster. This latest incident is another powerful illustration of the ways in which social media can be gamed by conspiracy theorists. It’s an issue social networks have struggled to fully grasp; any suppression of conspiracy theorists’ pages, after all, lends credence to the notion that they are oppressed keepers of vital truths. Infowars’ Alex Jones was recently personally banned from Facebook for 30 days after the platform determined that several videos he shared were determined to have violated community standards; Jones and his fanbase reacted with predictable opprobrium and claims of censorship.  But Facebook did not assert that Jones’ penchant for spreading baseless conspiracy theories was part of the rationale for the ban; instead, it focused on policies regarding hate speech and bullying. That, in turn, raised questions of why Infowars as a whole did not receive a ban.

Social media platforms that purport to be concerned with the spread of “fake news” must consider -- and contain -- conspiracy theories proactively, not just when journalists point them out. Left unchecked, those conspiracy theories have a direct connection to subsequent harassment and worse.