No, StackOverflow is quite a reliable source of correct and relevant answers to programming questions, with effective mechanisms for the community to identify and fix wrong or unhelpful answers.

It won't remain that way if those mechanisms are DoSed with a firehose of free plausible garbage. The flippant attitude that what we currently have is no better than that firehose, and the implication that it isn't worth worrying about or attempting to protect, is starting to grate.

People make mistakes in stack overview. The community identifies an incorrect (or suboptimal) answer as accepted fairly often in my experience.