Random or poorly thought out ideas are fine (this is a grand time-waster site, after all). What would be nice is if people framed it along the lines of being a novice seeking clarity, rather than their novice idea being "so obvious" or otherwise going to revolutionize a field countless people have spent a lifetime trying to resolve. Something closer to "I have this theory, does anyone know if it lines up with an existing theory, or if it is debunked/doesn't actually make sense (and if so, how)?" That would make it more clear that they are looking for the beginner's explanations for things.