Part of the answer to your question (for me) is connected to whether the question is well put.
Is it sensible and grammatical?
Has the author reread their question before posting it, maybe even edited it? In other words, did they take a little extra time to show respect for their readers?
Is it trying to solve a problem, drawing on others’ expertise?
Or is it fishing for opinions which are necessarily related to variables that cannot possibly be controlled for?
Too often, the problem is baked into the question. (Not that people don’t like to chest-beat or just flood the forum with their pet theories or long-winded opinions, too.)