Fact-Checking Instagram Privacy: Does Signing out Conceal Your Account?
Logging out does serve one critical function: hardware security. If you access your account on a public terminal, an employer's laptop, or a borrowed tablet, logging out removes your credentials from that specific browser.
As security analyses from Business Insider and Alphr emphasize, forgetting to sign out leaves your session tokens active. Anyone opening that browser can view private communications, publish media, or alter personal information.
Investigating suspicious activity requires checking your Instagram login activity through the Meta Accounts Center. If you notice an unfamiliar city or device, you should immediately log out of all devices.
Meta Accounts Center -> Password and Security -> Where You're Logged In -> Select All -> Log Out
This server-side flush invalidates every active JSON Web Token connected to your account profile across all phones, tablets, and computers. It forces any unauthorized user back to the login screen without destroying a single piece of your published content.