Deceived by an AI-generated Pakistan-based website that quickly spread online, thousands of people turned up in Dublin, Ireland, on Thursday night, lining streets for a Halloween parade that didn't exist.

Thousands of people who gathered together for a parade on the streets of Dublin were left confused when they discovered the whole thing was an online hoax.

Attendees said they felt hornswoggled by the happening, a la the notorious Fyre Festival, a so-called luxury musical event that famously stranded thousands of revelers on an island with nothing but meager food and emergency tents.

AI slop sites — also known as AI chum — are websites that owners fill with AI-produced content (typically of poor or no quality) that’s intended to “exploit Google search” so that when someone looks for certain topics like “Halloween events near me,” for example, the site will pop up and earn some ad revenue, according to tech news outlet Gizmodo.

Irish revellers flooded the streets of Dublin expecting a Halloween parade last night. The only problem? No parade had been organised.View on euronews

The owner of a Pakistan-based website which shared details of a non-existent Halloween parade in Dublin says it was "a mistake, it was a not a joke, it was not a scam". On Thursday, hundreds of people gathered on O'Connell Street in Dublin city centre for the parade but no police or stewards were present.