If you are a reasonably senior developer there are close to zero questions that you have that should be asked on stack overflow. You already have enough ability to figure out most problems on your own. Or if you can't, it's most likely too niche for SO and you need to hunt out a friendly subject matter expert instead.
Alternatively, if you're a beginner, it's likely all the questions you have have already been asked, and you are SOs target audience. But not for asking questions, just for looking up the answers. Use SO like a differently organised Wikipedia instead.
Blocking SO is a really odd response, it's one of the best and most comprehensive well organised data sets of beginner to mid level programming information. Don't contribute, fine, but why stop using what's there. Similar to how only 0.1% of people contribute to Wikipedia, doesn't mean it's not still a valuable resource for the other 99.9%