We promise you, Instagram did not randomly delete your account last night. Instead, the popular photo sharing app suffered a glitch that prevented some users from logging in. Users, however, jumped to conclusions and the hashtag #Dontdeletemyaccount made its rounds, ultimately being used on over 500,000 photos.
Today, Instagram has issued an apology and explanation: "Yesterday we experienced technical issues that caused people to be unable to access their accounts for a short period of time. We restored access as soon as the issue was brought to our attention, and we're sorry for any inconvenience this may have caused you."
Rumors swirled that Instagram was deleting accounts to clear server space or punish users who violated the company's Terms of Service. It's highly unlikely, for future reference, that Instagram or any web company would randomly delete user accounts. Next time, wait a few days as it's most likely a glitch.