This thread has raised some very valid points. Much of my riding is on MUP's but like all of us I do cross streets on a regular basis.

I've always removed my plastic reflectors and for a lot of the reasons noted here about them possibly working loose I sure don't intend to replace them. However as I was reading this I was thinking about the colored reflective tape sold down at my local outdoor store (MEC as it turns out) and I think I'll be doing the same adhesive soft spoke reflector trick that was shown a few posts above this. Most of my rims are flat box section types so I have my doubts about rim mounted patches being that visible from the side. On the disc brake rims this isn't an issue and a couple of swatches of adhesive reflector is on the shopping list.

Thinking back to my driving I do remember seeing those two "rolling" reflections coming back at me and there's no doubt that they really stand out.