I can understand using flashing lights on the road, due to the increased light pollution from car headlights, taillights, and street lamps...you want to draw attention to the fact that there's a bike on the road, and flashing lights do a pretty good job of catching someone's attention.

But on the MUTs/MUPs, I find flashing lights to be very annoying and complete overkill. I can see solid lights just fine. For the sake of other MUT users, please switch to solid mode on the MUTs!