The Brief: 'DNI' is an abbreviation for "do not interact" which is heavily used in NSFW online communities.

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“Do not interact” or ‘DNI’ refers to online communities on Instagram that post NSFW content that may jeopardize a social media user’s safety or sense of comfort. This term is very effective for people who are navigating through the internet and are sifting through adult content such as the kink and CGL community on Instagram. The phrase helps younger users be cautious of the profiles and social media accounts they interact with and allows them to identify which users may be inappropriate.