Why is everyone being such a ♥♥♥♥?
Leave these people alone, they really aren't doing anything bad, so what their creations are crude, and may not have millions of hours put into them. Your super precious workshop is fine anyway, these never make it to the front page or anything, and no great workshop people are going to stop making their things because of these.
Let everyone start somewhere, for all you know these people could become the admin who regulates the workshop.

If you see one in your workshop browser, ignore it! Just keep going past. There's no need to click it and and be mean to the creator. - People like that are what are polluting the workshop, the whole steam community even. LEAVE THESE POOR PEOPLE ALONE.

If a 5-6 year old does a drawing and shows it to you, you don't say "Oh god it's cancer, its going to ruin the art museums, you should atop drawing". You say its great and that they should keep going, because if you do, they get better and better.