What started as a simple promotion to give away Champions League tickets has quickly escalated into a marketing nightmare for British potato chip company Walkers.
Launched on Twitter this morning, the automated promotion asked for fans to post a selfie, which football star Gary Lineker would hold, while delivering his branded sponsor message.
It sounded like an innocent concept, until social media saboteurs began bombarding the account with portraits of serial killers and convicted pedophiles.
Meet Walkers Crisps connoisseur Peter Sutcliffe, aka The Yorkshire Ripper ...