When they decided to sprout the "sub-stack-overflows" they decided that each sub would have a topic. There is a sub for interetation of Jewish religious law, and you wouldn't post a programming question there. But if you mostly READ stackoverflow questions (on the subject of coding) and you have a question about using PGP commandline options, you're not supposed to post it on stackoverflow just because it's the one you read most. That would be a superuser question (probably).