https://github.com/TOTBWF/SteamCurses/issues/16 is someone who is making an issue on their own project because they are interested in a Rust re-write.
https://github.com/acrisci/i3-style/pull/38 is someone who has a PR open on their own project to re-write in Rust.
https://github.com/mintsuki/storm/issues/2 is someone being obnoxious, sure. Not serious, but you could also say it's annoying.
https://github.com/tkaden4/karat/issues/2 is someone on their own repo.
https://github.com/jezen/is-thirteen/issues/582 is already on a joke project, so it's also a joke.
https://github.com/dadrian/whereiszakir/issues/4 is someone on their own project.
https://github.com/adangert/telegram-events-bot/issues/1 does seem like an actual random person making a real suggestion.
https://github.com/spencereir/pharbot/issues/1 is being meme-y so probably not serious, still annoying.
https://github.com/ansuz/RIIR/issues/35 is on a repo specifically to track this phenomenon. It has 35 issues open. Many of which aren't actually examples of people saying this.
https://github.com/jezen/is-thirteen/issues/497 is a second issue on the joke project above.
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So, yes. Out of 900 possible issues, in the top 10, one may be a serious request, and two are shitposting, which may be annoying as well, admittedly, but is just as likely to come from people complaining about this as from "The rust community" broadly.
At that level, it's effectively noise.
(Edit: there are nearly 4.5k issues with their title containing rewrite rust on github: https://github.com/search?p=2&q=rewrite+rust&type=Issues)