R2D2 Bike Helmet

Adam @ MAKE writes:

Philadelphia area maker Jenn Hall improved the visual quality of her motorcycle helmet by turning it into a R2D2 helmet. The process included scuffing up the existing paint job and adding consecutive coats of spray paint and laboriously cut masking tape. The whole thing is finished off with some PVC tubing, some blinking lights, and plenty of clear coat. What a great way to liven up an otherwise mundane safety apparatus.

There was some conversation in the comments about the safety issues around using paints on the helmet (they can weaken the plastic) and about the protruding PVC pieces. What mods could you suggest that might make this fun design safer? Perhaps stickers like the ones used in this R2D2 lamp hack?