Not in my experience. Sure, if the post is either offtopic (to the site) or easily mistaken for trolling, it's going to be downvoted pretty quickly. From the g

Not in my experience. Sure, if the post is either offtopic (to the site) or easily mistaken for trolling, it's going to be downvoted pretty quickly. From the guidelines: Off-Topic: Most stories about politics, or crime, or sports, unless they're evidence of some interesting new phenomenon. Videos of pratfalls or disasters, or cute animal pictures. If they'd cover it on TV news, it's probably off-topic. So even if it's related to the original submission, a post might be off-topic.