The Trump administration just revealed plans to force every single foreign tourist to cough up their social media history from the last five years if they want to set foot in the United States. Everyone from casual vacationers to business travelers could soon have to hand over their online lives to border agents. The announcement, buried in a federal register notice, is being touted as the next big leap in “border security,” but critics are already calling it a privacy nightmare.

According to officials, U.S. Customs and Border Protection (CBP) wants to make it absolutely mandatory for every traveler to spill their social media usernames. This isn’t just for the usual visa suspects,over 40 countries, including friendly allies like the UK, France, Germany, Japan, and Australia, are on the chopping block. Even travelers using the so-called “Visa Waiver Program” (VWP),which until now allowed them a quick and easy trip for up to 90 days,will have to submit to this new digital strip search if the plan goes through.

Here’s how it works: If you want to apply for the ESTA, the streamlined travel permit that’s supposed to make visiting the U.S. a breeze, you’ll have to supply details on every social media account you’ve used in the last five years. Miss a single account or forget an old handle? No ESTA for you. The application fee is $40, but now the real price is your online privacy.

This is just the latest in a string of crackdowns by the Trump administration, all in the name of “national security.” Officials claim that snooping through people’s posts and likes will help catch terrorists and extremists before they set foot on American soil. Never mind that previous versions of this policy only targeted a select group of visa applicants,now it’s a one-size-fits-all solution, regardless of where you come from or why you’re visiting.

Up until now, listing your social media was voluntary. Now, if Trump’s team gets its way, you’re on the hook. They haven’t even bothered to clarify which platforms they’ll be looking at, but with previous forms demanding Facebook, Twitter, Instagram, LinkedIn, and YouTube, expect nothing to be off-limits. Got a secret meme account? Better fess up or risk being turned away at the border.

Unsurprisingly, privacy groups and travel industry bigwigs are in an uproar. They’re calling the proposal invasive, dangerous, and a surefire way to scare off legitimate travelers who don’t want their cat videos or political rants scrutinized by U.S. officials. There’s also the question of how effective this really is,could a poorly translated tweet or a sarcastic joke get you banned from the country?

Of course, supporters of the plan are cheering it on. In their view, everyone’s a potential threat, and the only way to keep America safe is to dig through years of posts, shares, and hashtags. Forget privacy,this is about security, they say, no matter the cost.

If the proposal goes through, the U.S. will set a new global standard for social media surveillance at the border, leaving other countries in the dust. Millions of travelers could be affected, with the government sifting through the digital footprints of virtually anyone who wants to visit. The public has a short window to comment before it becomes law,but if history is any guide, your next vacation to the States might require a background check on your online alter ego.