We have a well performing Low Quality Posts queue, in which most of the posts in question are landing due to the automatic flagging or by user interaction.
Is it possible to hide the questions written by users lower than say 50 rep and flagged as low quality. The OP should get some kind of notification about the delay and hidden status. If the community decides that the flag is invalid, the post goes back into the open questions lists (maybe on top of like when a new comment arrives), otherwise it will be closed.
This won't make the registration and questioning process harder, but it would encourage the new users to write better questions.
I am not sure if it is a thing already or not, but such patterns like error error messages indicating a parse error in the title (or even in the body) should be marked as low quality or something. Most of these questions are now closed as off-topic anyways or left as unanswered with a few comments underneath.