I'm thinking of things like assigning constants to pointers in C and/or manipulating pointers directly.
The best you can hope for is some answer down the page that says something like "to answer the actual question..."
> I actually need to do X, so those answers are useless to me.
I know what you mean. Whenever I (rarely) ask a question on Stack Overflow, I always have to defensively load it up with language anticipating misinterpretations and instructing people to answer my question and not some other one.
Otherwise, internet-point-chasers will fall through the woodwork giving easy, worthless advice. Even with all the defensive language, a few always show up.
Agree. This isn't a problem on the partner/sister sites as much. They are very helpful too. But they don't show up on Google
I call them pseudo-trolls because I think they are well-meaning, but they function as trolls: overrunning a web site, hijacking discussions with repetitive and irrelevant content, and making most potential users feel that participating isn't worth the time and effort of interacting with them.
Related: I've often been looking how to do X, find an SO question asking that, but the answerers there refused to answer until the person explained why they wanted to do X, and then all the answers (correctly) told the person that they actually needed to do Y and explained quite well how to do Y.
I actually need to do X, so those answers are useless to me.
Then I find another question on how to do X, and the mods close it as a duplicate of that earlier question. Even when the questioner specifically notes in their question that it is not a duplicate of that earlier question because they really need to do X the idiot moderators close it.