Normally when you are submitting a work / editing a draft piece for submission, the Submission Rating is defaulted to General.
Wanted to suggest that there be no default rating given to drafts, and that users will be required to manually select them (even if it is a general level work) and if they attempt to submit without applying a rating, they receive some sort of notification to the effect of "Please select and appropriate content rating before submitting."
Often times I may be writing up a draft submission and either rushing or doing so absentmindedly and often times will forgot some things: and what with the rating type being all the way at the bottom this is often one of those things.
Fortunately it has only happened once but i've accidentally submitted a mature / nude artwork with a general rating because I just totally forgot about it.
I also wanted to suggest this because, I was discussing the site with a friend and they mentioned that in the short time they've used the site they have had to report several works that were mis labeled as 'General', and we both thought that changing / removing the default rating and forcing a manual selection may cut down on works that slip through on accident. Thanks for reading! :D
Customer support service by UserEcho