No. The Rust project developers are more lenient when it comes to developing patches with AI assistance, but the amount of leniency one receives is proportional to the amount of pre-existing trust a contributor has with the project, and every PR still has to be reviewed by an independent human. A stranger dumping a zillion lines of slop in a PR is a one-way ticket to having your PR politely closed.

Very likely not, if they are of similarly low quality.