What is a one-sentence summary of the following article?
abusive or irritating users. If you're constantly bothered by someone on Instagram, the easiest way to prevent them from harassing you is by blocking them. You can also report the person from the Instagram Help Center if the person in question is illegally harassing or threatening users. password frequently. To avoid having your account hacked or compromised, change your password at least every six months. You can also reset an unknown Instagram password if need be. You can make your Instagram account private—meaning that people who aren't currently following you can't view your content until you accept their follow request—from within the mobile app's settings:  Open Instagram  Tap the profile icon {"smallUrl":"https:\/\/www.wikihow.com\/images\/4\/44\/AndroidIGprofile.png","bigUrl":"\/images\/thumb\/4\/44\/AndroidIGprofile.png\/36px-AndroidIGprofile.png","smallWidth":460,"smallHeight":383,"bigWidth":"36","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of an Android icon.\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a><br>\n<\/p><\/div>"}  Tap the gear icon (iPhone) or ⋮ (Android). Tap the "Private Account" switch. Tap Yes if prompted. Instagram account for a while. If there's controversy or undesirable behavior surrounding your account, it may be best to deactivate temporarily your Instagram account. You can reactivate the account at any time by signing back into it.

Summary:
Block  frequently. Consider making your account private.  for a while.