What behaviors typically result in heavy downvotes?

Certain comment patterns reliably trigger downvotes across most Reddit communities, reflecting shared norms about what constitutes unhelpful or disruptive participation. Understanding these helps you avoid common traps, especially in communities you are new to. Dismissive or condescending responses — comments that mock the original poster for not knowing something, respond with "just Google it," or imply the question is too basic to deserve an answer — generate downvotes even in communities that value expertise. Reddit broadly values a culture of accessible explanation, and gatekeeping knowledge is not well regarded. Off-topic comments, particularly in threads tagged [Serious] or in advice communities where the original poster is dealing with a difficult situation, are heavily downvoted. Posting a joke in a serious support thread or responding to a technical question with an unrelated personal anecdote signals that you did not read the room. Similarly, using a comment thread as an opportunity to argue a tangential political or ideological point when the post is not about that topic tends to attract downvotes from readers who want focused discussion. Stating something confidently and incorrectly tends to produce rapid and significant downvoting, particularly in science, history, medicine, or law communities where accuracy matters. Comments that spread misinformation, misquote statistics, or make sweeping claims without basis are often met with factual corrections in the replies followed by community downvotes. Self-promotion without value — posting a comment whose primary purpose is to advertise your own post, channel, or product — is another near-universal downvote trigger, as is begging for votes or awards. Personal attacks on other commenters, even when the provocation seems significant, typically result in the attacker receiving more downvotes than the target. Posting or commenting in a way that is clearly influenced by a group or ideological agenda rather than a genuine interest in the community's stated purpose also generates downvotes, particularly in communities that have explicit rules about staying on topic. When readers sense that a comment is delivering a predetermined message rather than engaging honestly with the specific thread, they treat the downvote as a signal to others that the engagement is not authentic.