They make people's eyes go buggy. Be kind to your readers. Concise verse takes as much craft as long poetry, if not more. We have nothing against sensuality, conflict, or dead relatives or pets, but if it's just being thrown in there to spice up a dull poem, take it out. Have something of interest to say, rather than a pretty way of saying nothing.
Brilliance is great, but without clarity it's nothing.
Poetry is communication, not just an academic exercise. Hate and bigotry. Remember, this site can be accessed from anywhere in the world where there's a computer. And Those People may very well be reading what we publish. But this is not a pulpit.