I think the way twitter is handling it is very interesting:
The user can't proceed without deleting the tweet, and seeing the tweet in their face forces the user to confront what they did wrong. I know that it's all too easy to see the warning message and then just scroll past and continue on business as usual. It's impossible to do that if your account is locked until you face the music.
I don't know how difficult this would be to implement, however, and I understand that the moderation doesn't want posts to be deleted anymore either. Perhaps a pop-up showing the post in a window that requires the user to click on a link in the middle of the page could serve the same purpose.
The user can't proceed without deleting the tweet, and seeing the tweet in their face forces the user to confront what they did wrong. I know that it's all too easy to see the warning message and then just scroll past and continue on business as usual. It's impossible to do that if your account is locked until you face the music.
I don't know how difficult this would be to implement, however, and I understand that the moderation doesn't want posts to be deleted anymore either. Perhaps a pop-up showing the post in a window that requires the user to click on a link in the middle of the page could serve the same purpose.