What Should One Do About Conspiracy Theories?

There have been some competing explanations for the Nord Stream explosions. Seymour Hersh claims the US did it. The New York Times claims it was Pro-Ukrainian forces and a somewhat obscure blogger claims he has evidence that it was the Russians. How is one to decide? And is it even necessary to decide? Is it perhaps more important to have a robust framework for conspiracy theories in general, than to have firm opinions about specific theories? How has the modern world made the whole entreprise more difficult?