Here's the thing about your message:
- It assumes everyone drawing bigger characters skinnier is doing so with fully acknowledged malicious intent
- It assumes that openly shaming people for it will fix the problem and make them draw fat characters 'properly'
I'm going to be completely honest with you for a moment.
I'm a teacher. I teach kids from ages 8 to about 15 (currently I'm teaching younger grades, but I've worked a lot with the older demographic as well.) So take what I say with the comfort that I at least know a little bit of what I'm talking about.
Why does this matter? Because a lot of the fanart that is gifted to me by this community comes not from adults, but from children. Sometimes, they're teens who have been drawing for a few years! Sometimes they're younger kids who have only recently begun to develop their skills.
Here's the reality - drawing bodies is hard. ANY bodies - skinny ones, fat ones, unusually shaped ones. In order to get good at it, you have to draw them a lot! And in order to draw, you need to find ways to practice. Usually, this happens by the budding artist looking around at other artists and copying them. Or looking at tutorials.
Here's another reality - unfortunately, the majority of art online, the majority of tutorials online, don't touch on drawing larger characters. They simply pretend it's not a thing. Finding references to larger people can take work! Getting started drawing larger people if you only have skinny-people references... is hard!
You know what doesn't make it easier? Getting shamed and told off by another artist for drawing characters 'too skinny'.
I teach English to students who have never learned English before. From 8 year olds to 15 year olds, you know what the one thing that remains constant is? Learning happens best through kindness and positive reinforcement. Not through shame and grabbing the child's attention and smearing it in their mistake like you're punishing a puppy that peed on the floor.
In fact, yelling at people of ANY age about their mistake pretty rarely gets them to stop making that mistake. What ends up happening more often is that they end up hating that activity altogether.
There's a reason I consciously and indiscriminately reblog all sorts of art - all of it has something that the artist excels at. Do all of them have great body proportions that are correct for the character? No. Some art is clearly made by people who are not used to drawing anything except super skinny characters!
But all of them ARE kind enough to read my comic, which I try to fill with body types that are diverse, true to the show itself. And that, in and of itself, is exposing them to art styles that don't have to over-rely on anime or CLAMP-esque noodly kids that look like they just popped out of Wonka's Laffy machine.
So yes, maybe they draw Steven or Rose too skinny. But they're also looking at Rose and Steven and clearly find them adorable, and maybe someday, they'll try something different for a change. It's not my job to rub their nose in the fact that they haven't gotten the chance to experiment yet. It's also not my job to ignore them if they don't have the 'correct' proportions, because like it or not, that's also punishment.
I do make it my job to try to reblog the fanart I see and promote it, because getting positive reinforcement and being encouraged to continue to experiment with art is what will make kids and teens AND adults confident enough to go beyond the socially-accepted weight-limit for MCs.
I know it can feel demoralizing to see a lot of character with your body type erased and made skinny as if that's a 'prettier' version of them. But 90% of the people drawing Steven skinny aren't doing it because they hate you. It's because they haven't been told it's ok to draw characters chubby. Or fat. And the unlearning part of that sort of thing is a process that needs support, not shame.
I don't expect you to be kind if you're hurt by that. You can react any way you want, and anger is a healthy emotion in this case.
But if you want ME to react with malice on your behalf, then I'm afraid I won't. I have another job to do, and that job is teaching with kindness.