People asked about this in 2012 https://knowyourmeme.com/forums/report-problems/topics/18480-how-can-you-turn-of-the-nsfw-feature and 2013 https://knowyourmeme.com/forums/announcements/topics/18478-nsfw-image-uploading
I would really like the option of being able to disable that filter when I am browsing in a place I don't have to worry about it in.
It gets hard to know what images are there if we want to add an example, and is frustrating for those of us who don't want to open big images and just assess thumbnails.