I have been seeing a somewhat increasing trend lately of questions which end with a variation of this sentence:
I would like to hear a native speaker's opinion, please.
Though I am sure that the OPs do not intend any harm, I do not feel this is a productive addition to a question. Honestly (and keep in mind that I am a native English speaker) I find it a tiny bit offensive. We have so many amazing users, and a good portion of them are non-native speakers who write excellent answers. It's true that there are some questions which naturally lean toward asking "Does this sound right to native speakers?" (especially when discussing differences between AmE and BrE, etc.). But I think there's a difference between that and simply appending a request that only native speakers provide answers to any question.
Native speakers can make mistakes. Non-native speakers can post the most excellent answer you've ever seen. And vice-versa. I think it's counterproductive and goes against community-building to attempt to exclude a group of people from answering your question. And anyway, the request cannot be enforced... Anyone can post an answer. If it's right, it'll get upvotes. If it's wrong, it'll get downvotes or comments saying so. If the OP's goal is to make sure they get a correct answer, trying to limit the responses to those of native speakers isn't going to do it. I've posted a few incorrect answers before, and I was glad to receive corrections. If there are users assuming everything I post is 100% guaranteed to be true and correct simply because I am a native speaker, well, that's probably not good for anybody.
So... As I felt this was counterproductive, unenforceable, and had the potential to make non-native speakers feel bad, I have been editing the sentence out of questions when I see it. But as I see this is something which isn't going away, I thought it was time to bring it up on meta. I'd like to propose that we make this official policy, and that others join me in editing sentences like these out of questions. But I also recognize that there might be another side to the discussion, and I welcome hearing the community's thoughts.