Once again, the reactions on KF are not exclusive to them. /pol/ is also doing this "based tattooed single mother" thing, and I doubt it's any different on Twitter given the reports I've seen saying even Nick Fuentes bent the knee after fellow woman-hater shitposter Beardson got mobbed for mocking Hendrix.
i think a lot of it is also age related. having tattoos 25 years ago as women was legit rare, it was like finding a chick into anime or a chick with a nice ass. Now its the norm. a majority of people under 50 have tattoos now, its literally on par with going "oh you like watching anime/using online media?" like yeah, its not the old days where that was legit worthy of mockery, even the fucking White house GOP are into it. its at the point where its like autism, you see more women proudly showing off their tattoos and anime love and very online persona than you would ever see a dude rocking that shit.
and when you focus on the ages of people on /pol/ and kiwifarms, there are tons of users who probably grew up with grandparents with tattoos at this point. obviously it wasn't as normal for women to have tattoos until about 25 years ago, but even then a combo of the internet and alternative culture meant that became mainstream very quickly.
If you ask the gen alphas or youngest zoomers they legit believe people weren't mocked for being emo in the late 2000s, or that people hated the hipsters and "indie sleaze"
I know just from people i know that unless you're part of the upper class, chances are you have tattoos as a woman if you're born after 1989. like the only woman i've seen in the past month that didn't have visible tattoos also was eating avocado toast and had a WFH job that paid 6 figures and was married to some guy making triple her salary selling weapons to Israelis.
Like at this point its only a big deal if you're a weirdo. the same way people used to use travel agents and if you heard someone do that now you'd mock them even harder if they acted like they were superior for doing so