1 - They are something we should try to mitigate, but not prevent
I am very much in support of posters of these questions adding solutions of their own to their questions in order to give a baseline. I agree with the opinions stated that throwaway answers designed to just "get the ball rolling," aren't often very interesting and aren't deserving of the attention they get. But I don't think that we should delete them.
It's been mentioned before, with regard to trivial solutions, that taking action against solutions that aren't particularly "good" for some definition thereof isn't ideal. Votes will, unfortunately, always tend toward certain answers, whether it be because they're early, funny, or in an aptly-named language. You can probably think of more examples, too (the easiest way would be to look at the most popular challenges). Trying to fight the will of the people by taking direct action against them is, in my opinion, foolish.
Preemptive action, to me, is the best solution, but it is of course not perfect. For a problem like this, you take away the possibility for someone posting a simple baseline by writing one yourself and including it in your post. Does that prevent someone from writing one anyways? No. There might be a slightly less simple baseline that they implement or maybe they'll post the baseline in another language, but we shouldn't be taking pains to account for all of these possibilities.
I feel like to some extents there is an implicit (at least in the way I am interpreting it, feel free to argue with me) claim that these posts don't "deserve" their votes or attention. Trying to make sure answers get votes proportional to the ones they "deserve" is ridiculous. HNQ-drawn voters have, for better or for worse, votes as powerful as our own. It might feel unfair to the regulars -- I for one am displeased to see a trivial solution in a golfing language overshadow a creative solution in another -- but the votes have been cast.
2 - On elitism
I also wanted to second what @Fatalize had to say and give my own input regarding elitism. Let me preface this by saying that I like this site a lot. There have been tons of interesting challenges I've really enjoyed answering and answers I've really enjoyed reading. But I do think there are some things that make it difficult for newcomers.
I feel like PPCG is a bit insular as a community, which isn't too much of a problem for most users. The standard that submissions and answers are held to and the pretty strict policing, in fact, are in part what makes the content on this site so good. I see similar quality control on other Stack Exchange sites. However, it can be daunting to the uninitiated, which I feel is spoken to by the number of new questions and answers we get that need rephrasing, edits, and sometimes even deletion. If I recall correctly, I was able to join in with relative ease because I lurked enough to pick up on the sort of "culture," for lack of a better word, but not everyone is as careful as I am, nor should they have to be.
In answers, there's the way we format them to include bytecount, the way we count bytes for some languages, the (optional, but encouraged) use of TIO, explanations, so on and so forth. In questions, there's the use of the sandbox, standard guidelines, policies on default exceptions, etc. I'm sure most of this is covered in the guide to the site, but this doesn't make it any less daunting. And let's not forget "culture"-specific things that people need to learn (what golfing and esoteric languages are, references such as "crossed out 44," outgolfing Dennis, etc.).
There's nothing wrong with any of this, and I think as a whole the community is welcoming and kind, but it's still worth bearing in mind how PPCG might appear to those who don't visit it every day. Any transition to a new community requires some getting used to, but for a public community like PPCG I think it's best to try to be cognizant of this public presence, especially of the people who might not be so in the know. I feel like I'm sort of on the outskirts of the community of PPCG, and I've been visiting the site semi-frequently for over two years now (wow). Keep the guys who are seeing it for the first time in mind, too.
Not that I think PPCG has a significant problem with this, I've said before and I'll say again that I think for the most part it's welcoming. But in my opinion, trying to police things that get more and more specific may make it harder for newer members to contribute.
Sorry for the wall of text; I realize I wrote a lot for this. I didn't really intend to, I guess it's something I'm more passionate about than I thought.
I welcome any argument against what I have to say.