WIPS posted here should receive constructive feedback and/or speculative suggestions. Don't tear posters down obviously, but if they've made an unfixable choice this time, it's OK to suggest that they or a reader make a different choice next time even if it won't help the poster on their current project.
Example:
Hey, my concrete Vriska horns won't stay upright on my wig, help?
How can we help you?Well, since they're so heavy you'll probably need a solid headband anchored with metal screws. But next time, you might want to try a lightweight material like expanding foam.