If you are not signed in to the Facebook empire, Instagram will not show you any content. You can get a little (photo posts, abbreviated profile) if you are signed in to facebook but not Instagram, but if you have opted out of the whole ecosystem you get a login screen on instagram no matter what. This is my experience. Easily reproduced by using a private browsing window. I argue that walled off content not available on the open web should not be FPP material.
Do links to Instagram cause weird browser behavior for you? If so, is this a Metafilter issue, a browser issue, an Instagram issue, or what? [more inside]
It's time for a roll call of the social-media inclined pets of Metafilter! [more inside]
I've seen mathowie pop up in lots of places before, but this one takes the cake.
Instagram Web Profiles [more inside]
Pony request: add Instagram as a social app on profiles. [more inside]
Any other MeFites use Instagram? [more inside]