Area 51 is a classified remote part of the US Air Force’s Edwards Air Force base
Inside US Air Force's UFO research centre - where sightings are ranked and rated
Naruto running is a meme inspired by an anime character called Naruto Uzumaki who has a distinctive running style.
But a former UFO investigator for the Ministry of Defence (MoD) has reinforced the US Airforce's stark warning.
Nick Pope, 53, worked for the British government for years until the MoD announced UFO sightings would no longer be investigated.
"I understand people’s curiosity about Area 51 and about government UFO secrets more generally, and I completely support people’s right to undertake a legal, peaceful protest, but that’s not how this event is being billed," he told Metro .
"Trespass on a military base is a federal offence and people run the risk of getting jail time, a fine and a criminal record. Warning signs at Area 51 even state that the use of lethal force is authorised.
"This is unlikely and guards are only authorized to open fire in exceptional circumstances, such as if they believe they’re in imminent danger themselves, but who knows what might happen if things get out of hand?"