CSS offers plenty of ways to hang yourself without resorting to SASS. The people who are dangerous with SASS tend to already be just as dangerous with plain CSS, in my experience.
The additional options for self harm are well offset by the features.
Would you believe anyone who asks you to email a copy of your id really knows how to delete your ID from their systems or would care enough to follow through?
Do you use the video gestural interpreter input option https://vimeo.com/7133810 ? It really helps keep you in good shape. Kind of a "Code Code Revolution!"