The dangers of lucid dreaming?

I was browsing the DMT subreddit and someone made a post where they said "lucid dreaming is a slippery slop" when I asked what they ment by this they explained that they had read in this subreddit and in another subreddit I can't type for some reason that people have various negative reasons for not lucid dreaming. Such as sleep paralysis, sleep demons, lack of knowing what's real. I've never heard of anything like this. All the times I've lucid dreamed it's been without any intention. So I was just curious what you all would have to say on the subject.