(not using green text because fudge der police)
>browse Tumblr for Undertale cosplay
>find this one really good Undyne cosplay
>before considering posting the pic I check the person's blog to see if they have a "please do not repost" request on their main page
>Instead what I find is a whole page where the person says stuff like "do not follow me if you're someone who thinks misandry or racism against white people is real, and don't follow me before asking if you're a cishet white male"
Yeah the person behind that pretty cool looking cosplay is basically the very stereotype of a "social justice warrior." Basically I had a moment of "when you find some art or cosplay you like, but find out that the person behind it is someone you would rather not interact with at all."
Similar thing happened when I first found Tom Preston back in his old days of doing fetish art. I liked his art at the time, but when I found out how much of a jerk the guy can be I stopped following him on art sites.
(I admit I dunno why I feel like mentioning this, but that Tumblr blog in question had a Jojo background theme, specifically featuring Jolyne Cujoh)