This article investigates the spread of misinformation on social media by analyzing 11 million posts and examining user behaviors in propagating content from trusted versus suspicious news sources. The study contrasts population and subpopulation behaviors, revealing that a small group of highly active users are responsible for spreading disinformation, with significant differences observed across demographics. It also finds that news from trusted sources is shared more quickly, while users with lower income and education levels are more likely to spread disinformation.