Hi I am not sure about the consequences if you abscond but just wanted to share with you an article from The Peninsula Newspaper that from 15th of this month the visa would no longer be stamped on the passport. Instead there would be a card like the one which is presently for Qatar ID which will serve as a visa proof.

Once your visa is expired the renewed one would not be pasted on the Passport but instead a new card would be given.

Not sure if this info will help you but just wanted to share.