I agree with Tea. Do we really need a new tag for something that's been occurring in yukkuri fandom for so long? Might as well just label it under the "abuse" tag.
I think there are other(=previous) images with scum human tag but whatever the case, it isn't much of being a scum. Hell, even a devout yukkuri lover could tease them like that with no serious intentions.
The tag scum human cropped up overnight, after the new AVR-18G strip. I don't know why you want to label these images anyway, as you clearly hate this kind of abuse. Why would you continue to look at them, or collect all the things you hate the most in one place? It seems more like that you're trying to show your hate and outrage for this kind of abuse, especially seeing as they've all been tagged "cute" at the same time. But whatever, trolling_yukkuri is a better tag.
This is a Yukkuri site, we care more about bad yukkuris that bad humans, sometimes when a truly sympathetic yukkuri get's fucked up by a truly disgusting human we may show our discontent and clearly not approve it, but, in the end, this board isn't about humans but about yukkuris, so, no human describing tags.