Pushing Sleeves Up

It's comfortable, and I think it looks cool. Actually I think it looks much better than a short sleeved blouse. Are scrunched sleeves ok or a big fashion mistake?
This particular look is generally flattering because it converts long sleeves into a three-quarter sleeve look which generally appeal since they make the arms and torso appear longer, thus make the body appear slimmer.
The thing to avoid is falling into too many of the tricks that were common in the 80s. (Pushed up sleeves were the rage, as was big hair, and popped collars.) It's one thing to incorporate a retro element, but another thing entirely to appear anachronistic.

See also:
How to dress to look slim
How to wear buttoned blouses
The boyfriend fashion trend